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AP Biology Practice Quiz: Meiosis and Genetic Diversity

Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026

Test your understanding with short quizzes. This quiz has 10 questions to check your progress.

Question 1 of 10

According to the provided text, which of the following events occurs during prophase I of meiosis to increase genetic diversity?

All Questions (10)

According to the provided text, which of the following events occurs during prophase I of meiosis to increase genetic diversity?

A) The random assortment of chromosomes into daughter cells.

B) The incorrect separation of chromosomes, known as nondisjunction.

C) The exchange of genetic material between non-sister chromatids.

D) The fertilization of gametes to form a zygote.

Correct Answer: C

The text explicitly states, 'During prophase I of meiosis, crossing over between non-sister chromatids exchanges genetic material, increasing genetic diversity among gametes.'

A failure of chromosomes to separate correctly during meiosis is referred to as nondisjunction. What is the direct consequence of this event?

A) The formation of gametes with a correct haploid set of chromosomes.

B) The production of aneuploid gametes.

C) An increase in genetic variation due to crossing over.

D) The successful completion of sexual reproduction.

Correct Answer: B

The provided content states that 'Incorrect separation (nondisjunction) results in aneuploid gametes.'

What is the outcome of a meiotic process where chromosomes separate correctly in both meiosis I and II?

A) Each gamete receives a diploid set of chromosomes.

B) All resulting gametes are aneuploid.

C) Each gamete receives a haploid set of chromosomes.

D) The process results in genetically identical gametes.

Correct Answer: C

The text specifies that 'Correct separation of chromosomes in meiosis I and II ensures each gamete receives a haploid set of chromosomes.'

Sexual reproduction in eukaryotes is a significant source of genetic variation. Which of the following is listed as a process that contributes to this variation?

A) The formation of sister chromatids during DNA replication.

B) The production of diploid gametes.

C) The random assortment of chromosomes.

D) The correct alignment of chromosomes in prophase II.

Correct Answer: C

The content mentions that sexual reproduction increases genetic variation through processes like 'crossing over, random assortment of chromosomes, and the subsequent fertilization of gametes.'

How does the exchange of genetic material between non-sister chromatids directly support the overall purpose of meiosis as described in the text?

A) It ensures the resulting gametes are haploid.

B) It is a primary mechanism by which meiosis generates genetic diversity.

C) It prevents nondisjunction from occurring during anaphase.

D) It guarantees the correct number of chromosomes in the gametes.

Correct Answer: B

The text states that meiosis 'generates genetic diversity' and that crossing over 'increases genetic diversity among gametes.' Therefore, crossing over is a key mechanism for achieving the genetic diversity that is a hallmark of meiosis.

Based on the context provided, an 'aneuploid gamete' is best understood as a gamete that has:

A) an incorrect number of chromosomes resulting from a separation error.

B) a standard haploid set of chromosomes from a successful meiosis.

C) undergone genetic exchange through crossing over.

D) been produced through asexual reproduction.

Correct Answer: A

The text contrasts the 'correct separation' which yields a 'haploid set of chromosomes' with 'incorrect separation (nondisjunction)' which 'results in aneuploid gametes.' This implies that aneuploid gametes have an incorrect chromosome number.

The process of crossing over involves the exchange of genetic material between specific structures. Which structures are identified as participating in this exchange?

A) Sister chromatids

B) Non-sister chromatids

C) Haploid and diploid cells

D) Homologous chromosomes during Meiosis II

Correct Answer: B

The content clearly states that crossing over occurs 'between non-sister chromatids.'

Which of the following statements best synthesizes the information about how genetic variation is achieved in eukaryotes?

A) Genetic variation arises exclusively from errors in chromosome separation, such as nondisjunction.

B) Meiosis generates genetic diversity through mechanisms like crossing over and random assortment, which is further enhanced by fertilization in sexual reproduction.

C) The sole purpose of meiosis is to ensure each gamete receives a haploid set of chromosomes, with genetic diversity being an accidental byproduct.

D) Fertilization is the only process that contributes to genetic variation in eukaryotes, while meiosis produces identical cells.

Correct Answer: B

This statement correctly integrates multiple points from the text: that meiosis generates diversity, that crossing over and random assortment are key meiotic processes for this, and that fertilization is also a component of variation in sexual reproduction.

What is the primary reason for the correct separation of chromosomes during both meiosis I and meiosis II?

A) To allow for crossing over between non-sister chromatids.

B) To prevent the formation of aneuploid gametes.

C) To ensure each resulting gamete is haploid.

D) To increase the rate of fertilization.

Correct Answer: C

The text directly states, 'Correct separation of chromosomes in meiosis I and II ensures each gamete receives a haploid set of chromosomes.'

A student claims that meiosis and sexual reproduction are fundamental for creating genetic variation. Which piece of evidence from the text best supports this claim?

A) Incorrect separation of chromosomes can result in aneuploid gametes.

B) Sexual reproduction increases variation through crossing over, random assortment, and fertilization.

C) Each gamete must receive a haploid set of chromosomes to be viable.

D) Crossing over occurs specifically between non-sister chromatids.

Correct Answer: B

This option provides the most comprehensive support for the claim by listing the three key mechanisms mentioned in the text (crossing over, random assortment, and fertilization) that contribute to the genetic variation generated by sexual reproduction.