Question 1

Which of the following best describes the difference between mitosis and meiosis in terms of their outcomes?

Accepted Answer

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

Question 2

A human somatic cell contains 46 chromosomes. After DNA replication but before mitosis, how many chromatids are present in the cell?

Accepted Answer

$$92$$

Question 3

Which phase of the cell cycle is characterized by DNA synthesis?

Accepted Answer

S phase

Question 4

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

Accepted Answer

Anaphase

Question 5

Which of the following processes increases genetic variation during meiosis?

Accepted Answer

Crossing over during prophase I

Question 6

If a cell with a diploid number of $$2n = 16$$ undergoes meiosis, how many chromosomes will each gamete contain?

Accepted Answer

$$8$$

Question 7

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

Accepted Answer

M checkpoint

Question 8

A drug that prevents the shortening of microtubules would most directly interfere with which process during mitosis?

Accepted Answer

Separation of sister chromatids during anaphase

Question 9

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

Accepted Answer

Pushing the poles of the cell further apart

Question 10

Which of the following statements about homologous chromosomes is correct?

Accepted Answer

They carry the same genes but may have different alleles.

Question 11

What is the primary role of the centrosome during cell division?

Accepted Answer

To organize the mitotic spindle

Question 12

Which of the following events occurs during prophase of mitosis?

Accepted Answer

Chromosomes condense and become visible

Question 13

Which process is responsible for the formation of a cleavage furrow during cytokinesis in animal cells?

Accepted Answer

Contraction of actin microfilaments

Question 14

In plant cells, what structure is responsible for separating the two daughter cells during cytokinesis?

Accepted Answer

Cell plate

Question 15

Which of the following equations correctly calculates the number of possible chromosome combinations due to independent assortment in gametes, where $$n is $$the haploid number?

Accepted Answer

$$2^n$$

Question 16

A cell is observed to have twice the normal amount of DNA but has not yet begun mitosis. In which phase of the cell cycle is this cell most likely found?

Accepted Answer

G2 phase

Question 17

Which of the following best explains why cancer can result from a failure in cell cycle regulation?

Accepted Answer

Cells ignore checkpoints and divide uncontrollably

Question 18

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

Accepted Answer

Synapsis of homologous chromosomes

Question 19

If nondisjunction occurs during meiosis II, what is the result?

Accepted Answer

Some gametes will have an abnormal number of chromosomes

Question 20

Which of the following statements about the G0 phase is correct?

Accepted Answer

Cells in G0 are not actively dividing

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

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