Question 1

Which of the following best describes the main purpose of meiosis in multicellular eukaryotes?

Accepted Answer

To reduce the chromosome number by half and generate genetic diversity in gametes

Question 2

During which stage of meiosis does crossing-over occur, and what is its significance?

Accepted Answer

Prophase I; it increases genetic variation by exchanging DNA between homologous chromosomes

Question 3

If a diploid cell with 24 chromosomes undergoes meiosis, how many chromosomes will each resulting gamete contain?

Accepted Answer

$$12$$

Question 4

Which of the following events distinguishes meiosis I from mitosis?

Accepted Answer

Pairing and separation of homologous chromosomes

Question 5

A mutation prevents crossing-over during meiosis. What is the most likely consequence?

Accepted Answer

Genetic variation among gametes will decrease

Question 6

Which equation correctly represents the reduction in chromosome number during meiosis?

Accepted Answer

$$2n \rightarrow n$$

Question 7

Why is the egg cell in animals significantly larger than the sperm cell?

Accepted Answer

It provides all the organelles and most of the cytoplasm for the new organism

Question 8

Which of the following best explains why gametes are haploid?

Accepted Answer

So that after fertilization, the resulting zygote has the correct diploid chromosome number

Question 9

What is the primary function of apoptosis in multicellular organisms?

Accepted Answer

To remove damaged or unnecessary cells in a controlled manner

Question 10

Which of the following is true about the products of meiosis in animals?

Accepted Answer

Only one of the four cells produced in females becomes a functional egg

Question 11

A cell in metaphase I of meiosis is observed under a microscope. Which of the following would you expect to see?

Accepted Answer

Homologous pairs of chromosomes aligned at the cell's midline

Question 12

Which process during meiosis is responsible for the independent assortment of genes?

Accepted Answer

Random separation of homologous chromosomes during anaphase I

Question 13

Which of the following best describes the genetic content of the four cells produced at the end of meiosis II?

Accepted Answer

Each cell is haploid and genetically unique

Question 14

Which of the following is a direct result of the random alignment of homologous chromosomes during metaphase I?

Accepted Answer

Increased genetic variation in gametes

Question 15

Which statement best explains why mitochondrial DNA is inherited only from the mother?

Accepted Answer

Sperm contribute only nuclear DNA during fertilization; all mitochondria come from the egg

Question 16

Which of the following equations represents the number of possible chromosome combinations due to independent assortment in a gamete, where $$n is $$the haploid number?

Accepted Answer

$$2^n$$

Question 17

A scientist observes a cell with condensed chromosomes, a disappearing nucleus, and homologous chromosomes paired together. Which stage of meiosis is this cell most likely in?

Accepted Answer

Prophase I

Question 18

Which of the following best describes the fate of the four cells produced by meiosis in human females?

Accepted Answer

One becomes a mature egg, the other three become polar bodies

Question 19

Which of the following is NOT a function of apoptosis?

Accepted Answer

Uncontrolled cell proliferation

Question 20

Which of the following statements about sperm is correct?

Accepted Answer

Sperm are motile and contain many mitochondria to power movement

Meiosis, Gamete Formation, and Apoptosis: Study Notes for Anatomy & Physiology

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드