Question 1

Homosexuality

Accepted Answer

A)   is seen only in humans.
B)   has been documented for only a few hundred years in only a few societies.
C)   likely reflects the input of several if not many genes and environmental factors.
D)   is inherited from a mutation on the X chromosome.
E)   is a matter of choice.

Question 2

Human females are the _______ sex.

Accepted Answer

A)   homozygous
B)   homogametic
C)   hemizygous
D)   heterozygous
E)   hermaphroditic

Question 3

Tamryn has a son who has Duchenne muscular dystrophy,which is inherited as an X-linked recessive trait.At a molecular level,the disease is due to lack of the protein dystrophin.Tamryn participates in a study to look at dystrophin levels in various muscles,so has cells sampled from 10 different muscles.Some cells make dystrophin,and some do not.An explanation for this finding is that

Accepted Answer

A)   the mutation is only in some muscle cells.
B)   Tamryn is making less dystrophin as she gets older. The study should be repeated at different ages.
C)   the X chromosome that bears the mutation is turned on in some cells but off in others.
D)   the mutation originated in the son.
E)   Tamryn does not have a Y chromosome.

Question 4

In cattle,mahogany spots are dominant in males and recessive in females.This trait is

Accepted Answer

A)   sex-linked.
B)   sex-limited.
C)   sex-influenced.
D)   sexually determined.
E)   not inherited.

Question 5

A gene that determines the heaviness of a man's beard is

Accepted Answer

A)   X-linked.
B)   differentiated.
C)   sex-limited.
D)   sex-influenced.
E)   Y-linked.

Question 6

A daughter can inherit an X-linked recessive disorder if

Accepted Answer

A)   her mother is a carrier and her father has the disorder.
B)   both parents are carriers of the disorder.
C)   her mother is affected with the disorder.
D)   her father is hemizygous for the disorder and her mother is wild type.
E)   her father is a carrier of the disorder.

Question 7

Chloe has the scaly skin condition icthyosis,which is X-linked recessive.Which of the following is most likely true?

Accepted Answer

A)   Her mother and father were both unaffected carriers.
B)   Her mother was affected and her father was unaffected.
C)   Her father was a carrier.
D)   Her mother was a carrier and her father was affected.
E)   She is a new mutation.

Question 8

Indifferent gonads develop

Accepted Answer

A)   during the first two weeks of prenatal development.
B)   during the fifth week of prenatal development.
C)   during the ninth week of prenatal development.
D)   when the embryo becomes a fetus.
E)   at puberty.

Question 9

Two unusual type of people who led researchers to discovery of the SRY gene were

Accepted Answer

A)   physicists and chemists.
B)   XX males and XY females.
C)   XY males and XX females.
D)   XXX females and XYY males.
E)   men and women who lack sex chromosomes.

Question 10

Human males and females are genetically equivalent because

Accepted Answer

A)   one of a female's two X chromosomes is inactivated.
B)   males only have one X chromosome.
C)   one X chromosome is inactive in male cells.
D)   females lack the Y chromosome.
E)   males are hemizygous.

Exam 6: Matters of Sex

Correct Answer
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Indifferent gonads develop

Correct Answer
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Chloe has the scaly skin condition icthyosis,which is X-linked recessive.Which of the following is most likely true?

Correct Answer
verified

A daughter can inherit an X-linked recessive disorder if

Correct Answer
verified

Homosexuality

Correct Answer
verified

In cattle,mahogany spots are dominant in males and recessive in females.This trait is

Correct Answer
verified

Two unusual type of people who led researchers to discovery of the SRY gene were

Correct Answer
verified

Human males and females are genetically equivalent because

Correct Answer
verified

Human females are the _______ sex.

Correct Answer
verified

A gene that determines the heaviness of a man's beard is

Correct Answer
verified

Exam 6: Matters of Sex

Correct AnswerverifiedShow Answer

Indifferent gonads develop

Correct AnswerverifiedShow Answer

Chloe has the scaly skin condition icthyosis,which is X-linked recessive.Which of the following is most likely true?

Correct AnswerverifiedShow Answer

A daughter can inherit an X-linked recessive disorder if

Correct AnswerverifiedShow Answer

Homosexuality

Correct AnswerverifiedShow Answer

In cattle,mahogany spots are dominant in males and recessive in females.This trait is

Correct AnswerverifiedShow Answer

Two unusual type of people who led researchers to discovery of the SRY gene were

Correct AnswerverifiedShow Answer

Human males and females are genetically equivalent because

Correct AnswerverifiedShow Answer

Human females are the _______ sex.

Correct AnswerverifiedShow Answer

A gene that determines the heaviness of a man's beard is

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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