Question 1

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

Accepted Answer

A haploid cell contains one set of chromosomes, while a diploid cell contains two sets of chromosomes.

Question 2

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 3

Which of the following processes is responsible for the genetic diversity observed in gametes produced by meiosis?

Accepted Answer

Crossing over and independent assortment

Question 4

What is the primary function of the mitotic spindle during mitosis?

Accepted Answer

To separate chromosomes into daughter cells

Question 5

If a human cell has 46 chromosomes at the start of mitosis, how many chromosomes will each daughter cell have after cytokinesis?

Accepted Answer

46

Question 6

Which checkpoint in the cell cycle ensures that all chromosomes are properly attached to the spindle before proceeding?

Accepted Answer

M checkpoint

Question 7

A cell that has exited the cell cycle and is not dividing is said to be in which phase?

Accepted Answer

G0 phase

Question 8

Which of the following events occurs during prophase of mitosis?

Accepted Answer

Chromatin condenses into visible chromosomes

Question 9

What is the result of nondisjunction during meiosis?

Accepted Answer

Aneuploid gametes with abnormal chromosome numbers

Question 10

Which equation correctly represents the number of possible chromosome combinations due to independent assortment in gametes?

Accepted Answer

$$2^n$$

Question 11

Which of the following statements about homologous chromosomes is correct?

Accepted Answer

They carry the same genes but may have different alleles.

Question 12

Which process occurs in meiosis but not in mitosis?

Accepted Answer

Synapsis of homologous chromosomes

Question 13

A cell with 2n = 16 undergoes meiosis. How many chromosomes will each gamete have?

Accepted Answer

8

Question 14

Which of the following best describes the role of p53 in the cell cycle?

Accepted Answer

It triggers repair or apoptosis if errors are detected at checkpoints.

Question 15

Which of the following is a function of non-kinetochore microtubules during mitosis?

Accepted Answer

Pushing the poles of the cell further apart

Question 16

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

Accepted Answer

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

Question 17

Which of the following best explains why crossing over during meiosis increases genetic variation?

Accepted Answer

It exchanges corresponding segments of non-sister chromatids from homologous chromosomes.

Question 18

What is the main difference between cytokinesis in animal cells and plant cells?

Accepted Answer

Animal cells form a cleavage furrow, while plant cells form a cell plate.

Question 19

Which of the following is true regarding the products of meiosis II?

Accepted Answer

Four genetically diverse haploid cells are produced.

Question 20

If a drug prevents the shortening of microtubules during mitosis, which process would be most directly affected?

Accepted Answer

Movement of chromosomes during anaphase

The Cellular Basis of Reproduction and Inheritance: Mitosis, Meiosis, and Genetic Variation

Study Guide - Practice Questions