Question 1

Which of the following best describes the difference between a gene and a chromosome?

Accepted Answer

A gene is a segment of DNA that codes for a specific trait, while a chromosome is a structure that contains many genes.

Question 2

If a human somatic cell contains 46 chromosomes, how many chromosomes are present in a human gamete after meiosis?

Accepted Answer

$$23$$

Question 3

Which process is responsible for reducing the chromosome number from diploid to haploid in sexually reproducing organisms?

Accepted Answer

Meiosis

Question 4

During fertilization, which equation correctly represents the restoration of chromosome number in humans?

Accepted Answer

$$n + n = 2n$$

Question 5

Which of the following statements about genetic variation in sexual life cycles is correct?

Accepted Answer

Genetic variation is produced by the random assortment of chromosomes during meiosis.

Question 6

A male gamete in humans is called a sperm cell. What is the chromosome number in a sperm cell?

Accepted Answer

$$n = 23$$

Question 7

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

Accepted Answer

Meiosis ensures that gametes have half the chromosome number, preventing chromosome doubling in offspring.

Question 8

If an organism has a diploid number of $$2n = 16$$, what is the haploid number of chromosomes in its gametes?

Accepted Answer

$$n = 8$$

Question 9

Which event during meiosis increases genetic diversity among offspring?

Accepted Answer

Crossing over between homologous chromosomes

Question 10

A female gamete in humans is called an egg cell. Which process leads to the formation of egg cells?

Accepted Answer

Oogenesis

Question 11

Which of the following is a direct result of fertilization in humans?

Accepted Answer

Restoration of the diploid chromosome number

Question 12

Which equation represents the chromosome number in a zygote formed from two human gametes?

Accepted Answer

$$23 + 23 = 46$$

Question 13

Which statement best describes sexual reproduction?

Accepted Answer

Sexual reproduction involves the fusion of two gametes to produce genetically unique offspring.

Question 14

Which of the following is NOT a function of meiosis?

Accepted Answer

Production of genetically identical cells

Question 15

If a mutation occurs in a gene located on a chromosome, what is the most likely consequence for the organism?

Accepted Answer

The organism may express a different trait or develop a genetic disorder.

Question 16

Which process restores the diploid number of chromosomes after meiosis?

Accepted Answer

Fertilization

Question 17

Which of the following best explains why siblings from the same parents can look different from each other?

Accepted Answer

Genetic variation produced during meiosis and fertilization

Question 18

Which of the following is a key concept of meiosis and sexual life cycles?

Accepted Answer

Meiosis reduces the number of chromosomes from diploid to haploid.

Question 19

Which of the following is true about homologous chromosomes?

Accepted Answer

They carry the same genes but may have different alleles.

Question 20

Which of the following equations correctly represents the chromosome number change during meiosis in humans?

Accepted Answer

$$2n \rightarrow n$$

Meiosis and Sexual Life Cycles: Key Concepts and Definitions

Study Guide - Practice Questions