Question 1

Which of the following best describes the process and outcome of crossing-over during prophase I of meiosis?

Accepted Answer

Crossing-over is the exchange of genetic material between homologous chromosomes, resulting in new combinations of alleles.

Question 2

A human somatic cell contains 46 chromosomes. After meiosis II, how many chromosomes are present in each resulting gamete?

Accepted Answer

$$23$$

Question 3

Which of the following events during meiosis increases genetic variation among offspring?

Accepted Answer

Independent assortment of homologous chromosomes during metaphase I

Question 4

Which statement correctly distinguishes between homologous chromosomes and sister chromatids?

Accepted Answer

Homologous chromosomes are similar but not identical, each inherited from a different parent; sister chromatids are identical copies formed during DNA replication.

Question 5

During which stage of meiosis do homologous chromosomes separate and move toward opposite poles?

Accepted Answer

Anaphase I

Question 6

Which of the following best explains why sexual reproduction leads to greater genetic diversity than asexual reproduction?

Accepted Answer

Sexual reproduction involves meiosis, crossing-over, independent assortment, and random fertilization, all of which increase genetic variation.

Question 7

A mutation occurs in a germ cell during meiosis I. Which of the following best describes the potential impact of this mutation?

Accepted Answer

The mutation will be present in all somatic cells of the offspring if the gamete is involved in fertilization.

Question 8

Which of the following equations correctly represents the relationship between ploidy and chromosome number in human cells?

Accepted Answer

$$2n = 46$$

Question 9

Which process is responsible for the formation of sperm cells in males?

Accepted Answer

Spermatogenesis

Question 10

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

Accepted Answer

Meiosis involves two rounds of cell division and produces haploid cells, while mitosis involves one round and produces diploid cells.

Question 11

Which stage of meiosis is characterized by the alignment of tetrads at the metaphase plate?

Accepted Answer

Metaphase I

Question 12

A researcher observes a cell with chromosomes arranged in tetrads and crossing-over occurring. Which stage is the cell most likely in?

Accepted Answer

Prophase I

Question 13

Which of the following best describes independent assortment?

Accepted Answer

The random orientation of homologous chromosome pairs during metaphase I, leading to genetic variation

Question 14

Which of the following is NOT a direct result of meiosis?

Accepted Answer

Production of genetically identical somatic cells

Question 15

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

Accepted Answer

Crossing-over, independent assortment, and random fertilization create unique combinations of alleles in each offspring.

Question 16

Which of the following is a disadvantage of sexual reproduction compared to asexual reproduction?

Accepted Answer

Sexual reproduction requires more energy and time to find a mate.

Question 17

If a diploid organism has a chromosome number of $$2n = 16$$, how many chromosomes will be present in each gamete after meiosis?

Accepted Answer

$$8$$

Question 18

Which of the following correctly matches the cell type with its ploidy?

Accepted Answer

Somatic cell: diploid

Question 19

Which process restores the diploid chromosome number in sexually reproducing organisms?

Accepted Answer

Fertilization

Question 20

Which of the following is true regarding the outcome of oogenesis in humans?

Accepted Answer

Oogenesis produces one functional ovum and three polar bodies from each primary oocyte.

Meiosis and Sexual Reproduction: Study Guide

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