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Chargaff found that in dna samples, __________.
Answer
Correct Answer:
The ratio of A to T is close to 1:1 and the ratio of G to C is close to 1:1
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Both a base and a phosphate are attached ____ in a nucleotide.
Answer
Correct Answer:
To a sugar
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All the information needed to make proteins is coded in dna by _____.
Answer
Correct Answer:
The order of bases
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All of the substances are ____________, which cause inheritable changes in genetic material.
Answer
Correct Answer:
Mutagens
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After meiosis, each new cell nucleus contains _____ chromosomes.
Answer
Correct Answer:
23
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A skin cell in g2 of interphase has _______________ as much dna as it had in g1.
Answer
Correct Answer:
Twice
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According to darwin, natural selection is based on the ____ found in populations.
Answer
Correct Answer:
Variations
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After dna replication is completed, _____.
Answer
Correct Answer:
Each new DNA double helix consists of one old DNA strand and one new DNA strand
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Erection (vasodilation) of the penis or clitoris ________.
Answer
Correct Answer:
Is primarily under parasympathetic control
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Homologous pairs of chromosomes are lined up independently of other such pairs during _____.
Answer
Correct Answer:
Metaphase I
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During the process of _______________, the genetic message from dna is transformed into mrna.
Answer
Correct Answer:
Transcrption
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Genes that code for the same genetic trait are __________.
Answer
Correct Answer:
Alleles
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During rna processing a(n) _____ is added to the 5' end of the rna.
Answer
Correct Answer:
Modified guanine nucleotide
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Telomeres are __________.
Answer
Correct Answer:
Repeating noncoding sequences at the ends of linear eukaryotic chromosomes
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Examine the genetic code table, shown below. the codon agc codes for the amino acid ______.
Answer
Correct Answer:
Serine
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Dna and rna are polymers composed of ______ monomers.
Answer
Correct Answer:
Nucleotide
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A woman has blond hair and brown eyes. this statement is best described as indicating ________.
Answer
Correct Answer:
Phenotype
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Genes ________ human action.
Answer
Correct Answer:
Enable
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The sugar and phosphate portion of the nucleotides are found _____ on the dna twisted ladder.
Answer
Correct Answer:
As segments of the rails
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The signal transduction pathway allows ________
Answer
Correct Answer:
One cell to regulate the gene expression of another cell
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The rna segments spliced to one another during rna processing are _____.
Answer
Correct Answer:
Exons
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The most controversial technique of genetic engineering is _____.
Answer
Correct Answer:
Cloning
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The initial product of transcription is referred to as the _____ transcript.
Answer
Correct Answer:
Primary
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The cross-fertilization of two different, but true-breeding, varieties of pea plants will _____.
Answer
Correct Answer:
Result in hybrid plants
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Polypeptides are assembled from _____
Answer
Correct Answer:
Amino acids
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Nucleic acids are assembled in the _____ direction
Answer
Correct Answer:
5' to 3'
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Messenger rna molecules contain information that is used to synthesize ___________.
Answer
Correct Answer:
Polypeptides(proteins)
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Males have one x and _______ y chromosome on .
Answer
Correct Answer:
One
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Linked genes may violate mendel's ____.
Answer
Correct Answer:
Principle of independent assortment
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Linked genes are inherited together. this is because linked genes _____.
Answer
Correct Answer:
Are on the same chromosome
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In rho-dependent transcription termination, the rho factor binds to ___________.
Answer
Correct Answer:
RNA
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In evolutionary terms, an organism's fitness is measured by its _____.
Answer
Correct Answer:
Contribution to the gene pool of the next generation
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In considering the cross yyrr x yyrr, the phenotype ratios of the f2 generation will be _____.
Answer
Correct Answer:
9:3:3:1
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The _____ directs a trna matching the mrna code to the proper sequence to assemble the protein.
Answer
Correct Answer:
Ribosome
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In humans, there are _______ autosomal linkage groups, plus an x and y chromosome linkage group.
Answer
Correct Answer:
22
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In a eukaryotic cell transcription takes place _____
Answer
Correct Answer:
In the nucleus
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Epithelial tissues are found ________.
Answer
Correct Answer:
Lining hollow organs
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X-ray diffraction images produced by __________ showed that dna is a __________.
Answer
Correct Answer:
Franklin; double helix
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Transcription involves the transfer of information from __________.
Answer
Correct Answer:
DNA to RNA
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The template for rna polymerase is ________, and the new rna chain is ________ to the template.
Answer
Correct Answer:
DNA / antiparallel and complementary
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The shared genetic code of all life on earth is evidence that ______.
Answer
Correct Answer:
All life shares a common ancestry
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The rho protein is involved in the _____ stage of transcription.
Answer
Correct Answer:
Termination
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The incorporation of an incorrect base into a dna molecule during replication __________.
Answer
Correct Answer:
Can be repaired by the mismatch repair system
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The energy required for assembly of a polypeptide by a ribosome comes directly from __________.
Answer
Correct Answer:
GTP
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Ribosomes form peptide bonds using their _____ activity.
Answer
Correct Answer:
Ribozyme
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Ribosomes can attach to prokaryotic messenger rna _____.
Answer
Correct Answer:
Before transcription is complete
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Plasmids function in bacterial cells to __________.
Answer
Correct Answer:
Confer to a cell additional genetic traits that are needed only under certain circumstances
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If individuals tend to mate within a subset of the population, there is ________.
Answer
Correct Answer:
Random mating
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Hiv binds to ___________ and infects and kills t cells bearing this protein.
Answer
Correct Answer:
CD4+ cells
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Gene regulation can involve a protein repressor that blocks _____ from initiating transcription.
Answer
Correct Answer:
RNA polymerase
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During mrna splicing ______
Answer
Correct Answer:
Both A & B
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During _______, rna polymerase synthesizes a molecule of rna using dna as a template.
Answer
Correct Answer:
Transcription
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Dna molecules are copied or replicated by a _______ mechanism.
Answer
Correct Answer:
Semiconservative
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Dna affects the traits of an organism by providing the instructions for synthesizing _______.
Answer
Correct Answer:
Proteins
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""differential reproduction"" is just another way of saying __________.
Answer
Correct Answer:
Natural selection
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_______ genes are expressed all of the time.
Answer
Correct Answer:
Constitutive
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Which one of the following is true? a codon _____.
Answer
Correct Answer:
Is the basic unit of the genetic code
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Reverse transcription, carried out by retroviruses, is the process by which _____.
Answer
Correct Answer:
RNA information is copied into DNA
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Reverse transcriptase produces __________ from an rna template.
Answer
Correct Answer:
CDNA
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Most of the genes controlling development encode either signal molecules or ________.
Answer
Correct Answer:
Transcription factors
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In eukaryotes, homologous recombination is initiated by ________.
Answer
Correct Answer:
Spo11 generating double-stranded DNA breaks
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In eukaryotes, the process of transcription is controlled by _____.
Answer
Correct Answer:
DNA
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Dna is synthesized through a process known as _____.
Answer
Correct Answer:
Semiconservative replication
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All of the following are involved in the process of trna charging except __________.
Answer
Correct Answer:
RRNA
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A recessive trait will be observed in individuals that are ________ for that trait.
Answer
Correct Answer:
Homozygous
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A nucleotide contains each of the following except a(n) _____.
Answer
Correct Answer:
Protein
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A (an) _______ is a group of three bases on trna that is complementary to a specific mrna codon.
Answer
Correct Answer:
Anticodon
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______ genes are expressed at a constant rate most of the time.
Answer
Correct Answer:
Constitutive
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One gene controls the synthesis of one _____
Answer
Correct Answer:
Polypeptide
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The result of a defective enzyme caused by a mutation in the dna nucleotide sequence is ________.
Answer
Correct Answer:
A genetic disease.
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To isolate a cloned gene from a dna library, researchers ______.
Answer
Correct Answer:
Probe the library using a labeled single-stranded dna complementary to the gene
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The rate of elongation of a dna strand in prokaryotes is __________ the rate in eukaryotes.
Answer
Correct Answer:
Much faster than
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The process of using the information in mrna to synthesize a protein is ______.
Answer
Correct Answer:
Protein synthesis
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The operon model of the regulation of gene expression in bacteria was proposed by _____.
Answer
Correct Answer:
Jacob and Monod
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The founder effect differs from a population bottleneck in that the founder effect ________.
Answer
Correct Answer:
Involves the isolation of a small colony of individuals from a larger population
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The following may be caused by mobile genetic elements except ________________
Answer
Correct Answer:
Undergo mutation
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The evolutionary force that operates on the basis of variation is __________.
Answer
Correct Answer:
Genetic drift
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The absence of a terminator in transcription will result in ______.
Answer
Correct Answer:
The production of a longer RNA molecule
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The abo blood group in humans is an example of __________ producing four phenotypes.
Answer
Correct Answer:
Multiple alleles
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Kyle is genetically a male; this means he received a(n) ________.
Answer
Correct Answer:
X chromosome from his mother, and a y chromosome from his father
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Each _____ is a specific segment of the dna with the code for production of one functional product.
Answer
Correct Answer:
Gene
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Biologists generally rely on _____ to identify prokaryotic organisms.
Answer
Correct Answer:
DNA
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Molecular systematics might examine all of the following types of data except ________.
Answer
Correct Answer:
Anatomical features
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Extinction is ________.
Answer
Correct Answer:
Natural process
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The lac operon of e. coli is ________ when the repressor is bound to lactose.
Answer
Correct Answer:
Active
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The lac operon constitutes all of these but _____
Answer
Correct Answer:
Promoter
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A(n) ________ is to bacteria as a ________ is to animal cells.
Answer
Correct Answer:
Prophage... provirus
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A dna replication bubble forms at a specific sequence of bases called the ___________.
Answer
Correct Answer:
Origin of replication. Both leading and lagging strand. Bacterial chromosomes form a single replication bubble, but eukaroytes can form several along each chromosome
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A ________ allele will always be expressed regardless of what the other allele happens to be.
Answer
Correct Answer:
Dominant
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_____ is the first enzyme to synthesize a nucleic acid at a replication fork.
Answer
Correct Answer:
DNA polymerase
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Consider the following figure. it indicates that a single amino acid substitution ______.
Answer
Correct Answer:
May alter a protein so that it no longer functions properly
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As a result of splicing, most protein-coding genes can encode ______ protein.
Answer
Correct Answer:
More than one. This allows one gene to code for different mRNAs.
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An anticodon is _____.
Answer
Correct Answer:
A set of triplet bases that is complementary to a codon triplet on mRNA
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An allele that can be masked or suppressed by another allele is said to be __________.
Answer
Correct Answer:
Recessive
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A mutation that has no effect on fitness is a ______.
Answer
Correct Answer:
Neutral mutation
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Is a complex molecule in the cell's chromosomes that carries genetic information.
Answer
Correct Answer:
Deoxyribonucleic acid (DNA)
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When describing down syndrome it's important to note that __________
Answer
Correct Answer:
It is usually caused by three copies of chromosome 21
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Short segments of newly synthesized dna are joined into a continuous strand by _____
Answer
Correct Answer:
Ligase
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Rna processing involves the addition of ________ to the ends of the rna transcript.
Answer
Correct Answer:
Extra nucleotides
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After replication, ______.
Answer
Correct Answer:
Each new DNA double helix consists of one old strand and one new strand
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Nucleotides have a phosphate group attached at the ___ carbon atom of the sugar.
Answer
Correct Answer:
5'
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Typically, when one wishes to represent a gene, the symbol used is _________.
Answer
Correct Answer:
In italics
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This is an image of a _____
Answer
Correct Answer:
Phage
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The lac repressor protein binds to the operator when it is ______.
Answer
Correct Answer:
Not bound to lactose
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For natural selection to gene,rate evolutionary change in a population ____. .
Answer
Correct Answer:
All
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When two haploid gametes combine, a zygote with _____ chromosomes forms.
Answer
Correct Answer:
24
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Traits with continuous variation will often display a ________ shaped distribution when graphed.
Answer
Correct Answer:
Bell curve-
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The function of the neuron's axon is to ________.
Answer
Correct Answer:
Carry messages to other cells
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The ________ receive information; the ________ transmit information..
Answer
Correct Answer:
The dendrites, axons
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Migration reduces genetic differences between populations by allowing gene _____ between the two.
Answer
Correct Answer:
Flow..
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If genes are completely linked, all the offspring will be _________.
Answer
Correct Answer:
Parental.
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Height, hair color, eye color, and intelligence are traits passed on by _____. .
Answer
Correct Answer:
Genes .
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For a recessive gene to be expressed in the phenotype, it must be paired with a ____..
Answer
Correct Answer:
Allele .
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An allosteric molecule is one in which ________.
Answer
Correct Answer:
The term used to describe any case in which a protein's function at one site is affected by the binding of a regulatory molecule to a separate site
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An allele that can mask another allele is said to be __________.
Answer
Correct Answer:
Dominant
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A trait within an organism that is present but not expressed is called __________.
Answer
Correct Answer:
Recessive trait.
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A trait controlled by a dominant gene ________.
Answer
Correct Answer:
Will be expressed even when the corresponding gene in the other half of the pair is different
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A terminator in mrna synthesis is a(n) __________.
Answer
Correct Answer:
Specific nucleotide sequence in DNA that signals a stop
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A spontaneous generation process is a process that has ____.
Answer
Correct Answer:
No input
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A single genetic locus that controls more than one trait is said to be __________.
Answer
Correct Answer:
Pleiotropic.
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A mechanism of inheritance that does not depend on differences in dna sequence is ______.
Answer
Correct Answer:
Epigenetic inheritance
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A gene that affects the expression of a second gene is an example of __________________.
Answer
Correct Answer:
Epistasis.
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The enzyme complex associated with dna in the associated figure is ________.
Answer
Correct Answer:
RNA polymerase
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When we say that an organism is haploid, we mean that __________.
Answer
Correct Answer:
Fertilization
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Translation begins when a __________ molecule binds to a ________.
Answer
Correct Answer:
MRNA; small ribosomal subunit
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Transcytosis is the mechanism whereby ________ is/are absorbed.
Answer
Correct Answer:
Peptides
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The unique sequence of bases in a nucleic acid is called the ________ structure.
Answer
Correct Answer:
Primary
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The transcription enzyme first attaches to the ________ of the gene.
Answer
Correct Answer:
Promoter
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The transcribed and translated region of a gene is the __________ region.
Answer
Correct Answer:
Coding
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The three principal structural components of a nucleotide are ________.
Answer
Correct Answer:
A phosphate group, a deoxyribose sugar, and a nitrogenous base
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The sequence of nucleotides in a dna molecule is called the ________ code.
Answer
Correct Answer:
Nucleotides.
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The sequence of ________________ in a dna molecule determines the protein that will be produced
Answer
Correct Answer:
Nucleotides
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The separated strands of dna are completed into two double helixes by dna _________.
Answer
Correct Answer:
Polymerase
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The constricted region of a chromosome is called a ____, and it is used to hold _____.
Answer
Correct Answer:
Centromere; chromatids to each other and to the mitotic spindle
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Relative dating uses ______ to estimate how old a fossil is.
Answer
Correct Answer:
Depth within rock layers
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Spliceosomes are composed of _____.
Answer
Correct Answer:
SnRNPs and other proteins
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The dna codon agt codes for an amino acid carried by a trna with the anticodon ______.
Answer
Correct Answer:
AGU
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The term "true-breeding plants" means __________.
Answer
Correct Answer:
That self-pollinating plants will always produce the same trait of a particular character
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The process of ________ requires the activity of dna ligase.
Answer
Correct Answer:
DNA replication
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This is an image of a(n) _____
Answer
Correct Answer:
Nucleotide
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The sickle-cell β-globin mutation is an example of a __________.
Answer
Correct Answer:
Missense mutation
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The anticodon of uag is ________.
Answer
Correct Answer:
AUC
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Stop codons are also called ________ codons.
Answer
Correct Answer:
Nonsense
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A nitrogenous base is indicated by the letter _____.
Answer
Correct Answer:
C
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The product of the laci gene is _____.
Answer
Correct Answer:
The repressor
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The nucleotides in the backbone of dna are held together by ________ bonds.
Answer
Correct Answer:
Hydrogen.
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The letter a indicates a _____.
Answer
Correct Answer:
DNA double helix.
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The function of mitosis and cytokinesis is to produce daughter cells that __________.
Answer
Correct Answer:
Are genetically identical to the parent cell
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The anticodon of a particular trna molecule is _____.
Answer
Correct Answer:
Complementary to the corresponding mRNA codon
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Transcription is the ______.
Answer
Correct Answer:
Manufacture of a strand of RNA complementary to a strand of DNA
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The most common time individual assortment occurs is when genes are ________?
Answer
Correct Answer:
Unlinked
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In the process of transcription, _____.
Answer
Correct Answer:
RNA is synthesized
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In humans, skin color is controlled by several genes. thus, skin color is a(n) ____ characteristic.
Answer
Correct Answer:
Epistatic
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Dna replication always proceeds by adding new bases to the _______ end of an existing strand.
Answer
Correct Answer:
3'
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Your chromosomes are located _______ and they are made of ___________ .
Answer
Correct Answer:
Inside the nucleus; DNA
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Up to ____% of weight is determined by genetics.
Answer
Correct Answer:
25 percent
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Which of the following statements about the voyage of the beagle ______ is true?
Answer
Correct Answer:
It turned into a tremendous opportunity for Darwin to collect fossils, plants, and animals
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Typical eukaryotic genomes are composed of ________ dna molecule(s).
Answer
Correct Answer:
Multiple linear
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The way that proteins fold into beta pleated sheets and alpha helices is dependent on their _____.
Answer
Correct Answer:
Primary Structure
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The trp (tryptophan) operon is an example of a(n) __________ operon.
Answer
Correct Answer:
Repressible
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The trna anticodon, gac, is complementary to the mrna codon with the sequence _____.
Answer
Correct Answer:
CU G
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X-linked recessive traits in humans (or in drosophila) are observed ________.
Answer
Correct Answer:
In more males than females
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When you cross two heterozygotes (aa), the offspring will most likely be __________.
Answer
Correct Answer:
In the ratio 1:1 homozygotes to heterozygotes
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Viroids are _____ molecules and are found in _____.
Answer
Correct Answer:
Small circular RNA ... potatoes and other vegetables
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Trna molecules work to _____.
Answer
Correct Answer:
Translate mRNA to produce a specific amino acid sequence
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To use rflp analysis to detect a snp, the snp must _______.
Answer
Correct Answer:
Occur within a restriction enzyme recognition sequence
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The type of mutation represented below is a(n) _____.
Answer
Correct Answer:
Insertion
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The toba supervolcanic event caused a bottleneck in the human population by _______.
Answer
Correct Answer:
Inducing an ice age
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Transcription and translation take place in the ________ and ________, respectively.
Answer
Correct Answer:
Nucleus; cytoplasm
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The genetic information is coded in dna by the ________.
Answer
Correct Answer:
The sequence of the nucleotides
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The genetic code is the link between the __________ and the __________ that they represent.
Answer
Correct Answer:
MRNA codons; 20 amino acids
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The actual photographed resolution is known as the ______ resolution.
Answer
Correct Answer:
Optical
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The size of dna is often given in the number of _____ that it contains.
Answer
Correct Answer:
Base pairs
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Part a in the diagram below, the gray unit represents _____.
Answer
Correct Answer:
RNA
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Linked genes are usually ________.
Answer
Correct Answer:
Located close together on a chromosome
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A phenotype can consist of _____ as well as _____ characteristics.
Answer
Correct Answer:
Physical; psychological
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A mutation can cause a change __________.
Answer
Correct Answer:
In the shape of a protein, in the amino acid sequence of a protein, in the way the cell cycle is regulated that is beneficial to the cell
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__________ function(s) as the template during translation.
Answer
Correct Answer:
Messanger rna
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The tata box is a __________ that allows for the binding of __________ and __________.
Answer
Correct Answer:
Eukaryotic promoter; transcription factors; RNA polymerase II
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The strand of dna that is not transcribed is called the ______ strand.
Answer
Correct Answer:
Coding
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The sos dna repair system is __________.
Answer
Correct Answer:
A last ditch effort to prevent cell death from large amounts of damage.
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The relationship between a gene and a messenger rna is that ________.
Answer
Correct Answer:
MRNAs are made from genes
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The radioactive isotope 32p labels the t2 phage's _____.
Answer
Correct Answer:
DNA
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The product of the p53 gene _____.
Answer
Correct Answer:
Inhibits the cell cycle
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The process of ________ is described as semiconservative.
Answer
Correct Answer:
DNA replication
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The disproportionately high appearance of polydactylism among the amish suggests that _______.
Answer
Correct Answer:
It was overrepresented in the gene pool of the original Amish settlers
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The discontinuous aspect of replication of dna in vivo is caused by ________.
Answer
Correct Answer:
The 5' to 3' polarity restriction
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The collection of _____ in a population constitutes that population's gene pool.
Answer
Correct Answer:
Alleles
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Telomerase reads ________ as a template and synthesizes ________ as a product.
Answer
Correct Answer:
RNA; DNA
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Sympatric speciation is _____. see concept 24.2 (page 511)
Answer
Correct Answer:
The appearance of a new species in the same area as the parent population
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Stem canker, cyst nematodes and late foliar disease are major diseases of__________ in brazil.
Answer
Correct Answer:
Soybeans
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Starting around age ___, organ size and efficiency begin to decrease.
Answer
Correct Answer:
30
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Shown below is a ribosome in the process of translation. the p site of a ribosome _____.
Answer
Correct Answer:
Holds the growing polypeptide chain
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Separation of sister chromatids occurs _______.
Answer
Correct Answer:
At anaphase in mitosis and anaphase II in meiosis
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Scientists have found that _____.
Answer
Correct Answer:
Genetic diversity decreased as early humans migrated away from Africa and founded new populations
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Replication of dna begins at a/n ___ rich area.
Answer
Correct Answer:
Adenine-thymine
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Prototrophs are bacteria that can grow on ________ medium.
Answer
Correct Answer:
Minimal
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On any given_____, there are a number of genes, but not all the genes will be coding for proteins.
Answer
Correct Answer:
Chromosome
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Most recessive genetic disorders are _____.
Answer
Correct Answer:
On the autosomes
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Most of the known single-gene disorders are _____.
Answer
Correct Answer:
Dominant
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Most human variation is due to _____ traits.
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Correct Answer:
Complex
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Morgan's analysis of a white-eyed male drosophila mutation helped explain ________.
Answer
Correct Answer:
X-linked inheritance
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Microinsertions and microdeletions often result in ________ mutations.
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Frameshift
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Introns are ______.
Answer
Correct Answer:
Noncoding DNA sequences
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Inbreeding can lead to a decrease in genetic diversity and _____.
Answer
Correct Answer:
Inbreedng depression
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In transcription, ________.
Answer
Correct Answer:
The mRNA produced is identical to the parent DNA
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In the united states, about _____ of the population is overweight; more than _____ are obese.
Answer
Correct Answer:
Two-thirds; a quarter
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In the lactose operon of e. coli, the crp-camp complex is a(n) _____ of transcription.
Answer
Correct Answer:
Positive regulator
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In the hardy-weinberg equation, p and q are _____.
Answer
Correct Answer:
Allele frequencies
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In the control of gene expression in bacteria, a regulatory gene __________.
Answer
Correct Answer:
All of the listed responses are correct.
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In the _______ of lactose, the lac ______ binds to the lac _______ site.
Answer
Correct Answer:
Absence; repressor; operator
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In prokaryotes, operons _____.
Answer
Correct Answer:
Regulate the rate of transcription of a set of genes
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In pcr, _______ creates single-stranded dna template molecules.
Answer
Correct Answer:
Heat
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In gene-cloning projects, plasmids function to ______.
Answer
Correct Answer:
Allow replication of the DNA thats being cloned
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In eukaryotic cells the first step in protein synthesis is the _____.
Answer
Correct Answer:
Transferring of information from DNA to messenger RNA
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In eukaryotes, when mature mrna is hybridized to complementary dna, ______.
Answer
Correct Answer:
Introns loop out as single-stranded regions of DNA
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In eukaryotes, general transcription factors ________ .
Answer
Correct Answer:
Bind to other proteins or to the TATA box
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If there is 24% guanine in a dna molecule, then there is ________ cytosine.
Answer
Correct Answer:
24%
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If the dna in a cell consists of 20% adenine, then it will also contain ___ guanine.
Answer
Correct Answer:
30%
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If an allele is dominant in one sex and recessive in another, it is an example of ___________.
Answer
Correct Answer:
Sex-influenced inheritance
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If a disease is caused by a dominant allele, it means that a person with the disease ________.
Answer
Correct Answer:
Could be either homozygous or heterozygous for the allele
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Hiv and phage lambda both __________.
Answer
Correct Answer:
Integrate their DNA into the host's chromosome
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Genetic variation in bacterial populations cannot result from __________.
Answer
Correct Answer:
Meiosis
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Genetic variation _____
Answer
Correct Answer:
Must be present in a population before natural selection can act upon the population
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Genetic drift produces variation for evolution when ________.
Answer
Correct Answer:
Chance events cause allele frequencies to fluctuate unpredictably
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Genetic drift is the result of ______.
Answer
Correct Answer:
Chance
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Genetic drift is _____.
Answer
Correct Answer:
More likely to have an impact on small populations
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Genes provide the information needed to produce _____ in the cell.
Answer
Correct Answer:
Enzymes
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Gene flow is accomplished by ______.
Answer
Correct Answer:
Migration
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Eric has blue eyes. since the gene for blue eyes is recessive, eric must be ______ for that trait.
Answer
Correct Answer:
Homozygous
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Environmental factors typically influence inheritance of ________.
Answer
Correct Answer:
Polygenic traits
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Each round of pcr ______.
Answer
Correct Answer:
Doubles the amount of DNA
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During translation, _____ is synthesized in the _____.
Answer
Correct Answer:
Polypeptides, mRNA sequences and cellular machinery
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During the transcription of a given portion of a dna molecule _____.
Answer
Correct Answer:
MRNA is synthesized on only one of the chains
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During telophase ______.
Answer
Correct Answer:
The events of prophase are reversed
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During replication dna _____
Answer
Correct Answer:
Is copied
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Disruptive selection favors individuals at ______ of variation
Answer
Correct Answer:
Both extremes
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Crossing over ____________ the number of recombinant offspring.
Answer
Correct Answer:
Increases
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Crossing over ________ genes into assortments of ________ not found in the parents.
Answer
Correct Answer:
Recombines linked; alleles
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Codons are base pair sequences that ________.
Answer
Correct Answer:
Code for amino acids
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Brca1 and brca2 are considered to be tumor-suppressor genes because _____.
Answer
Correct Answer:
Their normal products participate in repair of DNA damage.
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Bergman’s rule suggests that there is a correlation between temperature and ________________.
Answer
Correct Answer:
Size
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Bacterial dna polymerase i does not have ________ activity?
Answer
Correct Answer:
Endonuclease activity
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An mrna molecule has 540 codons. it must have at least _______ nucleotides.
Answer
Correct Answer:
1,620
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All of the following conditions are required for hardy-weinberg equilibrium except __________.
Answer
Correct Answer:
Natural selection
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All of the following are related to telomeres except __________.
Answer
Correct Answer:
Being found in eukaryotes and prokaryotes
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All of the following are required in complementation testing in yeast except _______.
Answer
Correct Answer:
An auxotrophic organism
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"all of the following are dna sequencing techniques except _____. select all that apply.
Answer
Correct Answer:
DNA fingerprinting Mullis chain-terminating sequencing
Note: This question has more than 1 correct answers
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According to chargaff's rules, ___ always pairs with ____, and _____ always pairs with _____.
Answer
Correct Answer:
A; T; G; C
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Aabb × aabb is an example of ____.
Answer
Correct Answer:
A dihybrid cross
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A stretch of 150 nucleotides in a coding region would code for _______ codons.
Answer
Correct Answer:
50
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A robertsonian translocation is considered non-reciprocal because _______.
Answer
Correct Answer:
The smaller of the two reciprocal products of translocated chromosomes is lost
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A ribozyme is __________.
Answer
Correct Answer:
An RNA molecule that functions as an enzyme
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A plasmid differs from the bacterial chromosome in that it is __________.
Answer
Correct Answer:
Plasmids contain genes that are NOT essential for cellular growth and replication.
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A plant with the genotype aabbcc is __________.
Answer
Correct Answer:
Homozygous for two different genes
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A phenotypic ratio of 9:3:3:1 in the offspring of a cross indicates that _____.
Answer
Correct Answer:
Both parents are heterozygous for both genes
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A monohybrid cross is made between plants that _____.
Answer
Correct Answer:
Differ in only one trait
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A human female has _____ chromosomes in each skin cell and _____ chromosomes in each egg.
Answer
Correct Answer:
46; 23
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A genetic locus has two alleles. one has a frequency of 0.12; the other has a frequency of _______.
Answer
Correct Answer:
0.88
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A gene made of __________ is transcribed into __________ and then translated to form a __________.
Answer
Correct Answer:
DNA ... RNA ... protein
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A gene is usually _____.
Answer
Correct Answer:
The information for making a polypeptide
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A dominant allele is best defined as ________.
Answer
Correct Answer:
An allele that stops or hides the expression of the other allele
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A ddntp, used often in dna sequencing, lacks a(n) ________ at the ________ and ________ carbons.
Answer
Correct Answer:
OH; 2'; 3'
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A cross that involves two traits is called a ______ cross.
Answer
Correct Answer:
Dihybrid
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A change from uug to uag would thus be a(n) _______ mutation.
Answer
Correct Answer:
Silent; nonsense
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A 1:1:1:1 ratio of offspring from a dihybrid testcross indicates that ___________.
Answer
Correct Answer:
The genes are not linked or are more than 50 map units apart.
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________ is to transcription as ________ are to translation.
Answer
Correct Answer:
RNA polymerase; ribosomes
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____ is an accessory protein that acts to chaperone nucleosome assembly.
Answer
Correct Answer:
Nucleoplasmin/N1
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