Question 1

Which of the following best describes parthenogenesis?

Accepted Answer

A form of asexual reproduction where females produce offspring from unfertilized eggs.

Question 2

In mammals, which gene is responsible for converting indifferent embryonic gonads into testes?

Accepted Answer

The SRY gene on the Y chromosome

Question 3

Which of the following is an example of sequential hermaphroditism?

Accepted Answer

A bluehead wrasse changing from female to male under social control

Question 4

Which vertebrate sex determination system is found in birds?

Accepted Answer

ZZ/ZW

Question 5

Which of the following best describes ovoviviparity?

Accepted Answer

Fertilized eggs are retained inside the parent, and nourishment comes from the egg yolk or cannibalism, not the parent.

Question 6

Which hormone is primarily responsible for maintaining the corpus luteum and preventing menstruation in early pregnancy?

Accepted Answer

Human chorionic gonadotropin (hCG)

Question 7

Which of the following is a correct sequence for the passage of sperm from production to ejaculation in humans?

Accepted Answer

Seminiferous tubules → epididymis → vas deferens → urethra

Question 8

Which structure in the human sperm contains enzymes that help penetrate the egg during fertilization?

Accepted Answer

Acrosome

Question 9

Which of the following best explains why testes descend into the scrotum before birth in humans?

Accepted Answer

To allow sperm to develop at a cooler temperature than body temperature

Question 10

Which of the following is a method of contraception that prevents ovulation?

Accepted Answer

Oral contraceptive pills containing analogues of progesterone and estrogen

Question 11

A researcher observes a species of lizard in which females can produce offspring without any contact with males. Which term best describes this reproductive strategy?

Accepted Answer

Parthenogenesis

Question 12

Which of the following is a unique feature of marsupial reproduction compared to placental mammals?

Accepted Answer

Young are born extremely underdeveloped and complete development in a pouch

Question 13

Which of the following best describes the role of FSH (follicle-stimulating hormone) in the female reproductive cycle?

Accepted Answer

Stimulates growth of ovarian follicles during the follicular phase

Question 14

Which of the following is a real-world example of temperature-dependent sex determination (TSD)?

Accepted Answer

Sex of crocodile hatchlings is determined by the temperature at which eggs are incubated.

Question 15

Which of the following best explains why only a few offspring of bony fish survive to maturity despite thousands of eggs being fertilized?

Accepted Answer

High rates of predation and environmental hazards in external fertilization

Question 16

Which of the following is a correct statement about the hormonal regulation of spermatogenesis?

Accepted Answer

FSH stimulates Sertoli cells, while LH stimulates Leydig cells to produce testosterone.

Question 17

Which of the following is a method of permanent sterilization in females?

Accepted Answer

Tubal ligation

Question 18

Which of the following best describes the function of the placenta in eutherian mammals?

Accepted Answer

It nourishes the developing young via direct connection to the mother's blood supply.

Question 19

Which of the following equations correctly represents the chromosomal composition of a human zygote?

Accepted Answer

$$46 = 23 (from sperm) + 23 (from egg)$$

Comprehensive Study Notes on Animal Reproduction and Reproductive Physiology

Study Guide - Practice Questions

Study Guide - Flashcards