Question 1

Which of the following best describes the chromosomal composition of a human zygote immediately after fertilization?

Accepted Answer

2n chromosomes: 44 autosomes and 2 sex chromosomes

Question 2

During spermatogenesis, how many mature spermatozoa are produced from one primary spermatocyte?

Accepted Answer

Four

Question 3

Which hormone is secreted by Sertoli cells and provides negative feedback for FSH secretion?

Accepted Answer

Inhibin

Question 4

A genetic mutation disables the srY gene on the Y chromosome in a developing embryo. What is the most likely outcome?

Accepted Answer

The embryo will develop ovaries

Question 5

Which of the following equations correctly represents the chromosome number in a human gamete?

Accepted Answer

$$n = 23$$

Question 6

Testosterone is primarily secreted by which cells in the male reproductive system?

Accepted Answer

Leydig cells

Question 7

Which duct system develops into the male reproductive tract under the influence of testosterone?

Accepted Answer

Wolffian ducts

Question 8

If a female is exposed to high levels of testosterone during embryonic development, which of the following is most likely to occur?

Accepted Answer

Development of Wolffian ducts

Question 9

Which of the following best explains why the adrenal cortex can influence sexual development in both males and females?

Accepted Answer

It produces androgens in both sexes

Question 10

A patient has a genetic disorder resulting in nonfunctional MIH (Mullerian-inhibiting hormone). What is the most likely consequence in a genetically male (XY) fetus?

Accepted Answer

Development of both male and female internal reproductive tracts

Question 11

Which of the following is a function of Sertoli cells in the seminiferous tubules?

Accepted Answer

Support sperm development and secrete androgen-binding protein

Question 12

Which equation correctly represents the chromosome number in a primary spermatocyte?

Accepted Answer

$$2n = 46$$

Question 13

Which hormone stimulates the release of FSH and LH from the anterior pituitary?

Accepted Answer

GnRH (Gonadotropin-releasing hormone)

Question 14

During which stage of human life does the ability to reproduce typically begin?

Accepted Answer

Puberty

Question 15

Which of the following best describes the role of the srY gene?

Accepted Answer

It codes for testis-determining factor, leading to development of testes

Question 16

A male patient has a mutation that prevents the secretion of FSH. What is the most likely effect on his reproductive system?

Accepted Answer

Impaired spermatogenesis due to lack of Sertoli cell stimulation

Question 17

Which of the following is true regarding the chromosomal content of human gametes?

Accepted Answer

Each gamete contains 22 autosomes and 1 sex chromosome

Question 18

Which of the following events marks the transition from embryo to fetus during human development?

Accepted Answer

After two months of gestation

Question 19

Which of the following best explains why not all genes are paired in human chromosomes?

Accepted Answer

Sex chromosomes (X and Y) carry different genes, especially in males

Question 20

A 48-year-old woman is experiencing menopause. Which of the following best describes her reproductive status?

Accepted Answer

She has lost the ability to reproduce

Human Reproductive System: Structure, Function, and Gametogenesis

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