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Exam 7: Development and Sex Determination

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Question 21

Multiple Choice

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Teratogens affect the ____ more than any other part of the fetal body.

A) central nervous system
B) upper limbs
C) heart
D) lower limbs
E) external genitalia

F) B) and D)
G) A) and D)

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Question 22

Multiple Choice

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Pattern baldness is a(n) ____ trait.

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

F) A) and B)
G) A) and E)

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Question 23

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Sex-influenced traits are expressed ____.

In humans,body size,muscle mass,and patterns of fat distribution are types of ____ sex characteristics.

A Barr body is a(n) ____.

The duct between a testis and a seminal vesicle used for the transport of sperm is the ____________________.

Children born with ____________________ have genital structures that are neither fully male nor fully female.

A fetus's exposure to ____ is the leading preventable cause of birth defects.

The health effects of X-rays on a fetus depend on the amount of ____________________ and the ____________________ of the fetus.

Chromosomal sex of a fetus with the sex chromosomes XXY is almost always ____________________.

Seminal vesicles secrete fructose and ____ into the semen

At term,____________________ changes initiate and drive the events surrounding birth.

In 2012,the International Olympic Committee began using tests that measure the levels and the body's response to the male hormone ____________________ as a means of distinguishing females from males when sex was questionable.

X inactivation can lead to ____________________ in females who are heterozygous for X-linked genes.

The inheritance of sex-influenced traits can be dominant in one sex but recessive in the other.

Sperm mature and are stored in the epididymis.

Bruce Reimer was born with ambiguous genitalia.

Figure -The accompanying figure illustrates the process of human development from fertilization to implantation.Describe what happens from day 1 through days 6-7 of this process.

The pathway from ____ sex to ____ sex can be disrupted at several stages.

Most of the protein eaten by the mother during the third trimester of pregnancy is used for fetal brain and ____________________ system growth and development.