Question 1

Which of the following statements best describes asexual reproduction?

Accepted Answer

It produces offspring that are genetically identical to the parent and involves inheritance of all genes from one parent.

Question 2

During which phase of the cell cycle does duplication of chromosomes occur?

Accepted Answer

Interphase

Question 3

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

Accepted Answer

To guide the separation of daughter chromosomes

Question 4

Which of the following is NOT a role of cell division in multicellular organisms?

Accepted Answer

Degradation of cellular waste

Question 5

In prokaryotes, cell division occurs by binary fission. Which of the following is a key difference between prokaryotic and eukaryotic chromosomes?

Accepted Answer

Prokaryotic chromosomes are typically a single circular DNA molecule, while eukaryotic chromosomes are multiple and linear.

Question 6

Which stage of mitosis is characterized by the alignment of chromosomes at the cell equator?

Accepted Answer

Metaphase

Question 7

During which phase of mitosis do sister chromatids separate and move toward opposite poles?

Accepted Answer

Anaphase

Question 8

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

Accepted Answer

Sexual reproduction involves the inheritance of unique sets of genes from two parents.

Question 9

If a diploid organism has $$2n = 46$$ chromosomes, how many chromosomes will its gametes have after meiosis?

Accepted Answer

$$n = 23$$

Question 10

Which process is responsible for the exchange of genetic material between nonsister chromatids of homologous chromosomes?

Accepted Answer

Crossing over

Question 11

A cell in metaphase of mitosis has 12 chromosomes. After cytokinesis, how many chromosomes will each daughter cell have?

Accepted Answer

12

Question 12

Which of the following events occurs during telophase of mitosis?

Accepted Answer

The nuclear envelope reforms around chromosomes at each pole.

Question 13

Which of the following is a direct result of independent orientation of chromosomes at metaphase I of meiosis?

Accepted Answer

Increased genetic variation in gametes

Question 14

What is the main difference between the products of mitosis and meiosis?

Accepted Answer

Mitosis produces two genetically identical diploid cells, while meiosis produces four genetically unique haploid cells.

Question 15

Which of the following best describes the role of the centromere during cell division?

Accepted Answer

It is the region where sister chromatids are most tightly connected.

Question 16

In animal cells, cytokinesis is accomplished by which of the following mechanisms?

Accepted Answer

Formation of a cleavage furrow by a contracting ring of microfilaments

Question 17

Which of the following is true regarding homologous chromosomes?

Accepted Answer

They have the same length, centromere position, and staining pattern, but may carry different versions of genes at the same locus.

Question 18

Which equation correctly represents the reduction in chromosome number during meiosis?

Accepted Answer

$$n = \frac{2n}{2}$$

Question 19

A mutation occurs in a gene located on a chromosome. During meiosis, how could this mutation be passed to offspring?

Accepted Answer

If the mutated chromosome is included in a gamete that participates in fertilization

Question 20

Which of the following processes contributes to genetic recombination during meiosis?

Accepted Answer

Crossing over between nonsister chromatids

The Cellular Basis of Reproduction and Inheritance (Chapter 8) – Study Notes

Study Guide - Practice Questions