Question 1

Gene interactions in which an allele at one locus prevents the expression of an allele at another locus is called

Accepted Answer

A)  complete dominance.
B)  incomplete dominance.
C)  epistasis.
D)  pleiotropy.E) B) and C)
F) None of the above

Question 2

To make recombinant DNA,

Accepted Answer

A)  bacterial DNA is annealed with restriction endonucleases.
B)  DNA is cleaved with restriction endonucleases and annealed together with plasmid or viral DNA.
C)  plasmid or viral DNA is cloned in mammalian cells.
D)  the "sticky ends" of the DNA must be annealed to the nuclear membrane.E) A) and B)
F) None of the above

Question 3

Males are said to be ________ for traits carried on the X chromosome.

Accepted Answer

A)  codominant
B)  polygenic
C)  hemizygous
D)  homozygousE) All of the above
F) B) and D)

Question 4

A section of a chromosome breaks out and then reinserts itself into the gap it left,but in the opposite direction.What is this called?

Accepted Answer

A)  Aneuploidy
B)  An inversion
C)  A translocations
D)  A deletionE) B) and D)
F) A) and D)

Question 5

Body cells and gametes typically have the diploid and ____________ number of chromosomes respectively.

Accepted Answer

The answer of Body cells and gametes typically have the...

Question 6

The polymerase chain reaction is

Accepted Answer

A)  part of the normal process of DNA replication in the cell.
B)  a way to amplify small samples of DNA when a short sequence is known.
C)  a method for constructing complementary DNA by transcribing the base sequence with reverse transcriptase.
D)  None of the choices is correct.E) B) and D)
F) None of the above

Question 7

In Mendel's pea plants,round seeds (R) were dominant,and wrinkled seeds (r) were recessive.The endosperm of the pea is also either starchy,a dominant gene (S) ,or waxy,the recessive allele (s) .If these genes are not linked,which of the following is true of a heterozygous dihybrid cross?

Accepted Answer

A)  It is impossible to obtain offspring that are homozygous for both dominant genes.
B)  It is impossible to obtain offspring that are homozygous for both recessive genes.
C)  It is impossible to obtain offspring that are homozygous dominant for one trait and homozygous recessive for the other trait.
D)  It is possible to produce offspring that are homozygous dominant for both traits,homozygous dominant for one trait but not the other,and homozygous recessive for both traits.E) B) and D)
F) A) and D)

Question 8

If a gene is not on the sex chromosome,it is found on a(an)

Accepted Answer

A)  autosome.
B)  locus.
C)  dyad.
D)  asexual chromosome.E) None of the above
F) A) and C)

Question 9

Sections of DNA that do not code for a final product,and which may intervene in a DNA sequence are

Accepted Answer

A)  transcribed into tRNA.
B)  exons.
C)  introns.
D)  interferons.E) A) and C)
F) B) and C)

Question 10

What is the anticodon for GCG?

Accepted Answer

A)  AUA
B)  UAU
C)  CGC
D)  AGAE) All of the above
F) A) and D)

Question 11

Which of the following is NOT part of Mendel's law of segregation?

Accepted Answer

A)  Each individual contains two factors for each trait
B)  One factor must be dominant and one factor recessive in each individual
C)  Each gamete contains one copy of each factor
D)  Fertilization restores the presence of the two factorsE) B) and D)
F) A) and D)

Question 12

Which of the following statements about DNA replication is NOT correct?

Accepted Answer

A)  Replication occurs as each base is paired with another exactly like it.
B)  Unwinding of the DNA molecule occurs as hydrogen bonds break.
C)  DNA polymerase catalyzes DNA replication.
D)  Complementary base pairs are held together with hydrogen bonds.E) A) and D)
F) C) and D)

Question 13

Which level of control in gene activity involves delay in translation,such as the buildup of oocytes messenger RNA until fertilization activates egg metabolism?

Accepted Answer

A)  Translational control
B)  Transcriptional control
C)  Gene rearrangement
D)  DNA modificationE) A) and B)
F) A) and C)

Question 14

You expect to find a ratio of 9:3:3:1 among the F2 offspring in which type of cross?

Accepted Answer

A)  Monohybrid cross
B)  Dihybrid cross
C)  Test cross
D)  Sex-linked crossE) C) and D)
F) A) and C)

Question 15

In a cross of parents with AA and aa genotypes for a particular trait,F1 offspring would show which genotype(s) ?

Accepted Answer

A)  AA and Aa
B)  AA,Aa,and aa
C)  AA only
D)  Aa onlyE) All of the above
F) C) and D)

Question 16

The location of a gene on a chromosome is called the gene __________.

Accepted Answer

A)  tetrad
B)  locus
C)  dyad
D)  synapsisE) A) and B)
F) A) and C)

Question 17

What was the relationship between Gregor Mendel's work and Charles Darwin's publication on evolution?

Accepted Answer

A)  Mendel's work came before Darwin's and gave Darwin a critical piece of the evolutionary puzzle
B)  Mendel read Darwin's work and this inspired him to experiment with principles of heredity
C)  Both were contemporaneous and worked back-and-forth,providing ongoing feedback for each other's work
D)  Mendel's discoveries were shortly after Darwin's publication,but the implications of his work were not understood for over thirty yearsE) A) and D)
F) A) and B)

Question 18

A complex of mRNA used to allow multiple molecules of the same protein to be synthesized concurrently is called a(n) _______________.

Accepted Answer

A)  anticodon
B)  transcription factor
C)  intron
D)  polysomeE) B) and D)
F) C) and D)

Question 19

Aneuploidy is the addition or subtraction of a single _____________ to or from a diploid set.

Accepted Answer

The answer of Aneuploidy is the addition or subtraction of...

Question 20

What was the relationship between Gregor Mendel's work and the growing understanding of cells and chromosomes?

Accepted Answer

A)  Mendel's work immediately generated great interest in what was the genetic material
B)  Mendel was unaware of chromosomes and genes,which were not identified for 30 years
C)  Breakthroughs in cytology and the structure of chromosomes were the factor that led Mendel to his experiments
D)  Mendel's work led cell biologists to discover the nucleus and its roleE) A) and C)
F) A) and D)

Exam 5: Genetics: a Review

Body cells and gametes typically have the diploid and ____________ number of chromosomes respectively.

Correct AnswerverifiedShow Answer

Which of the following statements about DNA replication is NOT correct?

Correct AnswerverifiedShow Answer

You expect to find a ratio of 9:3:3:1 among the F2 offspring in which type of cross?

Correct AnswerverifiedShow Answer

Sections of DNA that do not code for a final product,and which may intervene in a DNA sequence are

Correct AnswerverifiedShow Answer

Males are said to be ________ for traits carried on the X chromosome.

Correct AnswerverifiedShow Answer

A section of a chromosome breaks out and then reinserts itself into the gap it left,but in the opposite direction.What is this called?

Correct AnswerverifiedShow Answer

In Mendel's pea plants,round seeds (R) were dominant,and wrinkled seeds (r) were recessive.The endosperm of the pea is also either starchy,a dominant gene (S) ,or waxy,the recessive allele (s) .If these genes are not linked,which of the following is true of a heterozygous dihybrid cross?

Correct AnswerverifiedShow Answer

To make recombinant DNA,

Correct AnswerverifiedShow Answer

What is the anticodon for GCG?

Correct AnswerverifiedShow Answer

What was the relationship between Gregor Mendel's work and the growing understanding of cells and chromosomes?

Correct AnswerverifiedShow Answer

In a cross of parents with AA and aa genotypes for a particular trait,F1 offspring would show which genotype(s) ?

Correct AnswerverifiedShow Answer

Gene interactions in which an allele at one locus prevents the expression of an allele at another locus is called

Correct AnswerverifiedShow Answer

A complex of mRNA used to allow multiple molecules of the same protein to be synthesized concurrently is called a(n) _______________.

Correct AnswerverifiedShow Answer

The polymerase chain reaction is

Correct AnswerverifiedShow Answer

What was the relationship between Gregor Mendel's work and Charles Darwin's publication on evolution?

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Aneuploidy is the addition or subtraction of a single _____________ to or from a diploid set.

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If a gene is not on the sex chromosome,it is found on a(an)

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The location of a gene on a chromosome is called the gene __________.

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Which level of control in gene activity involves delay in translation,such as the buildup of oocytes messenger RNA until fertilization activates egg metabolism?

Correct AnswerverifiedShow Answer

Which of the following is NOT part of Mendel's law of segregation?

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You expect to find a ratio of 9:3:3:1 among the F₂ offspring in which type of cross?

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In a cross of parents with AA and aa genotypes for a particular trait,F₁ offspring would show which genotype(s) ?

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