Question 1

Which of the following best describes the main purpose of mitosis in multicellular organisms?

Accepted Answer

To generate genetically identical daughter cells for growth and repair

Question 2

During the cell cycle, which phase is primarily responsible for the replication of DNA?

Accepted Answer

S phase

Question 3

If a cell starts with 8 chromosomes, how many chromosomes will each daughter cell have after mitosis?

Accepted Answer

$$8$$

Question 4

Which structure is responsible for separating sister chromatids during mitosis?

Accepted Answer

Spindle fibers

Question 5

Cancer cells are characterized by which of the following behaviors?

Accepted Answer

They divide uncontrollably and ignore cell cycle checkpoints.

Question 6

Which of the following best explains why meiosis is essential for sexual reproduction?

Accepted Answer

It reduces the chromosome number by half, ensuring offspring have the correct chromosome number.

Question 7

A diploid cell with $$2n = 6$$ undergoes meiosis. How many chromosomes will each gamete contain?

Accepted Answer

$$3$$

Question 8

Which event during meiosis increases genetic variation among offspring?

Accepted Answer

Crossing over between homologous chromosomes

Question 9

What is the main difference between mitosis and meiosis in terms of chromosome number in daughter cells?

Accepted Answer

Mitosis produces cells with the same chromosome number as the parent cell, while meiosis produces cells with half.

Question 10

If a mutation occurs during meiosis and a gamete receives an extra chromosome, what is the likely outcome after fertilization?

Accepted Answer

The offspring will have one extra chromosome, potentially leading to genetic disorders.

Question 11

Which of the following best describes homologous chromosomes?

Accepted Answer

Chromosomes that carry the same genes but may have different alleles

Question 12

During which phase of meiosis do homologous chromosomes separate?

Accepted Answer

Anaphase I

Question 13

Which process is responsible for the production of gametes in animals?

Accepted Answer

Meiosis

Question 14

A cell with $$n = 10$$ chromosomes undergoes mitosis. How many chromosomes will each daughter cell have after division?

Accepted Answer

$$10$$

Question 15

Which of the following is a key difference between mitosis and meiosis?

Accepted Answer

Meiosis involves two rounds of cell division, mitosis involves one.

Question 16

Which of the following best explains why genetic variation is important in populations?

Accepted Answer

It allows populations to adapt to changing environments.

Question 17

If a cell fails to undergo cytokinesis after mitosis, what will be the result?

Accepted Answer

A single cell with two nuclei

Question 18

Which of the following events occurs during prophase of mitosis?

Accepted Answer

Chromosomes condense and the nuclear envelope breaks down

Question 19

Which equation correctly represents the chromosome number change during meiosis?

Accepted Answer

$$2n \rightarrow n$$

Question 20

Which of the following is a consequence of errors during meiosis?

Accepted Answer

Chromosomal abnormalities such as trisomy

Cellular Reproduction: Mitosis, Meiosis, and Genetic Variation

Study Guide - Practice Questions