Question 1

Which of the following best describes the difference between somatic cells and gametes in humans?

Accepted Answer

Somatic cells are diploid and gametes are haploid.

Question 2

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

Accepted Answer

Anaphase

Question 3

A researcher observes a cell with a clearly formed cell plate in the center. Which process and organism type is most likely being observed?

Accepted Answer

Cytokinesis in a plant cell

Question 4

Which of the following statements about homologous chromosomes is correct?

Accepted Answer

They carry genes for the same traits at the same loci, but may have different alleles.

Question 5

A cell with 46 chromosomes undergoes mitosis. How many chromosomes will each daughter cell have after cytokinesis?

Accepted Answer

46

Question 6

Which of the following best explains how independent assortment during metaphase I of meiosis increases genetic variation?

Accepted Answer

It allows chromosomes to line up in random orientations, resulting in different combinations of maternal and paternal chromosomes in gametes.

Question 7

Which checkpoint in the cell cycle is primarily responsible for ensuring that DNA is undamaged and fully replicated before mitosis begins?

Accepted Answer

G2 checkpoint

Question 8

A scientist observes a tumor that does not invade surrounding tissues or spread to other parts of the body. This tumor is best described as:

Accepted Answer

Benign

Question 9

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

Accepted Answer

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

Question 10

During which stage of meiosis does crossing over occur, and what is its significance?

Accepted Answer

Prophase I; it increases genetic recombination.

Question 11

A cell is observed to lack anchorage dependence and density-dependent inhibition. What is the most likely consequence?

Accepted Answer

The cell will continue to divide uncontrollably, potentially leading to cancer.

Question 12

Which of the following best describes binary fission in prokaryotes?

Accepted Answer

It is a simple process where the circular DNA replicates and the cell splits into two identical cells.

Question 13

If a human gamete with an abnormal number of chromosomes (n+1) fuses with a normal gamete (n), what will be the chromosome number of the resulting zygote?

Accepted Answer

$$2n+1$$

Question 14

Which of the following is true regarding the difference between autosomes and sex chromosomes in humans?

Accepted Answer

There are 22 pairs of autosomes and 1 pair of sex chromosomes in human somatic cells.

Question 15

A cell is observed in metaphase of mitosis. Which of the following best describes the arrangement of chromosomes at this stage?

Accepted Answer

Chromosomes are aligned at the metaphase plate, with kinetochores attached to spindle fibers from opposite poles.

Question 16

Which of the following equations correctly represents the chromosome number in a diploid organism after meiosis?

Accepted Answer

$$n$$

Question 17

A mutation occurs in a gene that codes for a growth factor. Which of the following is a possible consequence?

Accepted Answer

The cell may divide uncontrollably, contributing to tumor formation.

Question 18

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

Accepted Answer

Sexual reproduction combines genetic material from two parents, allowing for independent assortment, crossing over, and random fertilization.

Question 19

During which stage of meiosis do homologous chromosomes separate, and what is the result?

Accepted Answer

Anaphase I; each daughter cell receives one chromosome from each homologous pair.

Question 20

A patient is diagnosed with a malignant tumor that has spread to other organs. Which term best describes this process?

Accepted Answer

Metastasis

Cell Division: Mitosis and Meiosis (Chapters 9-10) Study Notes

Study Guide - Practice Questions

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