Question 1

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

Accepted Answer

A gene is a segment of DNA that codes for a specific trait, while an allele is a variant form of that gene.

Question 2

If a species has a diploid number of $$2n = 16$$, how many chromosomes are present in each haploid gamete?

Accepted Answer

$$8$$

Question 3

Which of the following statements is true regarding homologous chromosomes?

Accepted Answer

They carry the same genes but may have different alleles.

Question 4

During which phase of meiosis do homologous chromosomes separate?

Accepted Answer

Anaphase I

Question 5

Which process results in the production of genetically unique gametes?

Accepted Answer

Meiosis

Question 6

What is the formula for calculating the number of possible combinations of chromosomes due to independent assortment in a species with $$n$$ pairs of chromosomes?

Accepted Answer

$$2^n$$

Question 7

Crossing over during meiosis most commonly occurs during which phase?

Accepted Answer

Prophase I

Question 8

Which of the following is a direct result of nondisjunction during meiosis?

Accepted Answer

Gametes with an abnormal number of chromosomes

Question 9

Which of the following processes occurs in meiosis but not in mitosis?

Accepted Answer

Synapsis of homologous chromosomes

Question 10

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

Accepted Answer

$$23$$

Question 11

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

Accepted Answer

Sexual reproduction involves crossing over and independent assortment during meiosis.

Question 12

Which of the following statements describes a difference between mitosis and meiosis in a diploid organism?

Accepted Answer

Sister chromatids separate in mitosis, while homologous pairs of chromosomes separate in meiosis I.

Question 13

If nondisjunction occurs during Anaphase I of meiosis, which of the following is a possible outcome?

Accepted Answer

Some gametes will have an extra chromosome, and some will be missing a chromosome.

Question 14

Which of the following best describes independent assortment?

Accepted Answer

The random orientation of homologous chromosome pairs during metaphase I of meiosis.

Question 15

Which of the following is NOT a source of genetic variation in sexually reproducing organisms?

Accepted Answer

Binary fission

Question 16

During which stage of meiosis do sister chromatids separate?

Accepted Answer

Anaphase II

Question 17

A cell that has two copies of each chromosome is called a ________ cell.

Accepted Answer

Diploid

Question 18

Which of the following events increases genetic diversity during meiosis?

Accepted Answer

Crossing over between homologous chromosomes

Question 19

If a species has a haploid number of $$n = 4$$, how many genetically unique gametes can be produced due to independent assortment?

Accepted Answer

$$16$$

Question 20

Which of the following best describes the outcome of meiosis in animals?

Accepted Answer

Four genetically unique haploid gametes

Meiosis and Sexual Life Cycles: Structured Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards