Question 1

Which of the following best describes the difference between haploid and diploid cells?

Accepted Answer

Haploid cells contain one set of chromosomes, while diploid cells contain two sets.

Question 2

Which of the following is a key difference between somatic cells and gametes in humans?

Accepted Answer

Somatic cells are diploid, while gametes are haploid.

Question 3

Which of the following statements about autosomes and sex chromosomes is correct?

Accepted Answer

Autosomes are non-sex chromosomes, while sex chromosomes determine biological sex.

Question 4

Which of the following is NOT a way prokaryotic cells can evolve?

Accepted Answer

Binary fission

Question 5

Which event occurs during meiosis I but NOT during mitosis?

Accepted Answer

Crossing over between homologous chromosomes

Question 6

How does metaphase I of meiosis differ from metaphase II?

Accepted Answer

In metaphase I, homologous chromosome pairs align at the metaphase plate; in metaphase II, individual chromosomes align.

Question 7

What is a likely consequence of nondisjunction during meiosis?

Accepted Answer

Aneuploidy, which can lead to disorders such as Down syndrome.

Question 8

Which of the following is NOT a mechanism that increases genetic variation in sexually reproducing organisms?

Accepted Answer

Binary fission

Question 9

A cell with 46 chromosomes undergoes meiosis. How many chromosomes will each resulting gamete have?

Accepted Answer

$$23$$

Question 10

Which of the following best explains why sexual reproduction is advantageous for evolution?

Accepted Answer

It increases genetic variation, providing material for natural selection.

Question 11

During which phase of meiosis do homologous chromosomes separate?

Accepted Answer

Anaphase I

Question 12

Which process results in daughter cells that are NOT genetically identical to the parent cell?

Accepted Answer

Meiosis

Question 13

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

Accepted Answer

They are haploid and genetically unique.

Question 14

If a mutation occurs during crossing over in prophase I, what is the most likely outcome?

Accepted Answer

Some gametes may carry new combinations of alleles.

Question 15

Which of the following best describes the difference between mitosis and meiosis in terms of chromosome separation?

Accepted Answer

Mitosis separates sister chromatids; meiosis separates homologous chromosomes first.

Question 16

Which of the following is a direct result of crossing over during meiosis?

Accepted Answer

Increased genetic diversity among gametes

Question 17

A human cell with an extra chromosome (trisomy) is most likely the result of which process?

Accepted Answer

Nondisjunction during meiosis

Question 18

Which of the following best explains why asexual reproduction can be disadvantageous in changing environments?

Accepted Answer

It produces genetically identical offspring, reducing adaptability.

Question 19

Which phase of meiosis is most directly responsible for reducing the chromosome number by half?

Accepted Answer

Anaphase I

Question 20

Which of the following is NOT a characteristic of meiosis?

Accepted Answer

Produces genetically identical cells

Meiosis and Sexual Reproduction: Study Guide

Study Guide - Practice Questions