Question 1

In order for a girl to inherit hemophilia A,her parents would have which genotypes?

Accepted Answer

A)   XHXh, and XHY
B)   XHXh, and XhY
C)   XhXh, and XHy
D)   XHXH, and XHY
E)   XHXH, and XHyF) B) and D)
G) A) and D)

Question 2

The genetics researcher who discovered X-linked inheritance patterns by studying fruit flies was Thomas Hunt Morgan.

Accepted Answer

A) True 
 B)False

Question 3

A recessive allele is one whose effect is masked if a dominant allele is also present.

Accepted Answer

A) True 
 B)False

Question 4

In Huntington disease,a child will typically only get the disease if one parent also has it.It is as common in boys as in girls.This disease is

Accepted Answer

A)   pleiotropic.
B)   autosomal dominant.
C)   autosomal recessive.
D)   X-linked dominant.
E)   X-linked recessive.F) A) and E)
G) C) and D)

Question 5

When scientists inserted the Bt toxin gene into plant cells they created a

Accepted Answer

A)   stem cell.
B)   transgenic plant.
C)   new species.
D)   clone.
E)   monohybrid.F) B) and E)
G) A) and B)

Question 6

A male expresses

Accepted Answer

A)   only the dominant alleles on his X chromosome.
B)   none of the alleles on his X chromosome.
C)   only the homozygous recessive alleles on his X chromosome.
D)   None of the answer choices are correct.
E)   both the dominant and recessive alleles on his X chromosome.F) None of the above
G) A) and B)

Question 7

In pea plants,Y confers yellow peas,and y confers green peas.If you cross two heterozygous Yy pea plants,what fraction of the offspring will be yellow?

Accepted Answer

A)   75%
B)   25%
C)   100%
D)   0%
E)   50%F) C) and D)
G) B) and D)

Question 8

A Barr Body is a(n)

Accepted Answer

A)   inactive Y chromosome.
B)   inactive autosome.
C)   active X chromosome.
D)   active Y chromosome.
E)   inactive X chromosome.F) B) and E)
G) A) and E)

Question 9

All gametes contain

Accepted Answer

A)   two identical sets of chromosomes.
B)   two chromosomes.
C)   one set of chromosomes.
D)   two different sets of chromosomes.
E)   one chromosome.F) A) and E)
G) A) and D)

Question 10

Figuer:
In these data, the parental generation characteristics (resistant or susceptible)  are shown at top. 2 generation (the larvae measured in comparison) is shown in the graphs at the bottom of this figure.The cluster of bollworms at lower larva weights would have which genotype? A)  rr B)  RR C)  Rr or rr D)  Rr or RR E)  Rr" class="answers-bank-image d-inline" rel="preload" >
-The F2 generation (the larvae measured in comparison) is shown in the graphs at the bottom of this figure.The cluster of bollworms at lower larva weights would have which genotype?

Accepted Answer

A)   rr
B)   RR
C)   Rr or rr
D)   Rr or RR
E)   RrF) None of the above
G) A) and E)

Question 11

Mendel's monohybrid cross of Tt parents resulted in a tall to short ratio of

Accepted Answer

A)   2:1.
B)   1:3.
C)   1:1.
D)   3:1.
E)   1:2.F) C) and D)
G) A) and E)

Question 12

Variants or alternate forms of a gene are called alleles:

Accepted Answer

A) True 
 B)False

Question 13

In the study of genetics,the offspring of the parental generation is referred to as the

Accepted Answer

A)   F1 generation.
B)   F2 generation.
C)   homologous generation.
D)   wild-type generation.
E)   P generation.F) B) and D)
G) None of the above

Question 14

Environmental conditions affect single-gene traits rarely,but affect polygenic traits often.

Accepted Answer

A) True 
 B)False

Question 15

The chromosome that plays the largest role in human sex determination is

Accepted Answer

A)   the group of autosomes known as the SRY group.
B)   the Y chromosome.
C)   the X chromosome.
D)   chromosome number 21.
E)   chromosome number 22.F) B) and C)
G) A) and D)

Question 16

In pedigree charts,autosomal recessive disorders typically

Accepted Answer

A)   seem to disappear in one generation, only to reappear in the next generation.
B)   appear only in females.
C)   appear only in males.
D)   occur every third generation.
E)   appear in every generation.F) All of the above
G) B) and D)

Question 17

In an inherited form of high cholesterol,rr individuals have a blood cholesterol level greater than 500 mg/dL,Rr individuals are near 300 mg/dL,while normal (RR) cholesterol levels should be less than 200 mg/dL.The R allele is ___ to the r allele.

Accepted Answer

A)   incompletely dominant
B)   recessive
C)   dominant
D)   homozygous
E)   codominantF) All of the above
G) B) and D)

Question 18

Genotypes are the outward expression of an allele combination.

Accepted Answer

A) True 
 B)False

Question 19

If the two alleles for a particular gene are identical the gene pair is

Accepted Answer

A)   recessive.
B)   homozygous.
C)   homologous.
D)   heterozygous.
E)   dominant.F) C) and D)
G) A) and B)

Question 20

Crossing over is more likely to separate genes on a chromatid if they are

Accepted Answer

A)   close together.
B)   mutated genes.
C)   far apart.
D)   recessive genes.
E)   dominant genes.F) C) and D)
G) B) and D)

Exam 10: Patterns of Inheritance

All gametes contain

Correct AnswerverifiedShow Answer

Variants or alternate forms of a gene are called alleles:

Correct AnswerverifiedShow Answer

In pea plants,Y confers yellow peas,and y confers green peas.If you cross two heterozygous Yy pea plants,what fraction of the offspring will be yellow?

Correct AnswerverifiedShow Answer

Environmental conditions affect single-gene traits rarely,but affect polygenic traits often.

Correct AnswerverifiedShow Answer

In an inherited form of high cholesterol,rr individuals have a blood cholesterol level greater than 500 mg/dL,Rr individuals are near 300 mg/dL,while normal (RR) cholesterol levels should be less than 200 mg/dL.The R allele is ___ to the r allele.

Correct AnswerverifiedShow Answer

Mendel's monohybrid cross of Tt parents resulted in a tall to short ratio of

Correct AnswerverifiedShow Answer

If the two alleles for a particular gene are identical the gene pair is

Correct AnswerverifiedShow Answer

In Huntington disease,a child will typically only get the disease if one parent also has it.It is as common in boys as in girls.This disease is

Correct AnswerverifiedShow Answer

A Barr Body is a(n)

Correct AnswerverifiedShow Answer

A male expresses

Correct AnswerverifiedShow Answer

When scientists inserted the Bt toxin gene into plant cells they created a

Correct AnswerverifiedShow Answer

The chromosome that plays the largest role in human sex determination is

Correct AnswerverifiedShow Answer

The genetics researcher who discovered X-linked inheritance patterns by studying fruit flies was Thomas Hunt Morgan.

Correct AnswerverifiedShow Answer

Figuer: In these data, the parental generation characteristics (resistant or susceptible) are shown at top. -The F2 generation (the larvae measured in comparison) is shown in the graphs at the bottom of this figure.The cluster of bollworms at lower larva weights would have which genotype?

Correct AnswerverifiedShow Answer

In the study of genetics,the offspring of the parental generation is referred to as the

Correct AnswerverifiedShow Answer

In order for a girl to inherit hemophilia A,her parents would have which genotypes?

Correct AnswerverifiedShow Answer

A recessive allele is one whose effect is masked if a dominant allele is also present.

Correct AnswerverifiedShow Answer

Crossing over is more likely to separate genes on a chromatid if they are

Correct AnswerverifiedShow Answer

Genotypes are the outward expression of an allele combination.

Correct AnswerverifiedShow Answer

In pedigree charts,autosomal recessive disorders typically

Correct AnswerverifiedShow Answer

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Figuer: In these data, the parental generation characteristics (resistant or susceptible) are shown at top. -The F₂ generation (the larvae measured in comparison) is shown in the graphs at the bottom of this figure.The cluster of bollworms at lower larva weights would have which genotype?

Correct Answer
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