Question 1

During which phase of mitosis do the centromeres split, allowing sister chromatids to become daughter chromosomes and move to opposite poles of the cell?

Accepted Answer

Anaphase

Question 2

Which of the following best describes the outcome of mitosis in human somatic cells?

Accepted Answer

Two diploid cells, each identical to the parent cell

Question 3

A mutation in a gene regulating the G1 checkpoint of the cell cycle could most likely result in which of the following?

Accepted Answer

Uncontrolled cell division, potentially leading to cancer

Question 4

Which event is unique to Prophase I of meiosis and contributes to genetic diversity?

Accepted Answer

Crossing over between homologous chromosomes

Question 5

If a cell with 46 chromosomes undergoes meiosis, what will be the chromosome number in each resulting gamete?

Accepted Answer

$$23$$

Question 6

Which of the following best explains why eggs in females are larger than sperm in males after meiosis?

Accepted Answer

Eggs receive more cytoplasm during division, while sperm divide equally

Question 7

A patient is exposed to ionizing radiation, which disrupts cell cycle checkpoints. What is the most likely cellular outcome?

Accepted Answer

Cells may undergo uncontrolled division, increasing cancer risk

Question 8

During which phase of mitosis does the nuclear membrane disappear and the mitotic spindle form?

Accepted Answer

Prophase

Question 9

Which process is responsible for the division of the cytoplasm at the end of mitosis?

Accepted Answer

Cytokinesis

Question 10

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

Accepted Answer

Mitosis results in diploid cells; meiosis results in haploid cells

Question 11

Which checkpoint ensures that DNA has been properly replicated before the cell enters mitosis?

Accepted Answer

End of G2

Question 12

A cell undergoes abnormal division due to a mutation caused by a carcinogen. Which treatment is most likely to stop the division of these malignant cells?

Accepted Answer

Chemotherapy

Question 13

Which of the following best describes the genetic makeup of daughter cells produced by meiosis?

Accepted Answer

Genetically unique from each other and the parent cell

Question 14

Which environmental factor is most likely to cause fetal alcohol syndrome during development?

Accepted Answer

Alcohol exposure

Question 15

If a cell fails to express certain genes due to environmental influences, what process is most directly affected?

Accepted Answer

Differentiation

Question 16

Which of the following equations correctly represents the chromosome number after fertilization in humans?

Accepted Answer

$$23 + 23 = 46$$

Question 17

During meiosis in females, what happens to the polar bodies formed?

Accepted Answer

They usually degenerate and do not develop into eggs

Question 18

Which process is responsible for the random combination of maternal and paternal chromosomes during meiosis?

Accepted Answer

Anaphase I

Question 19

Which protein family is responsible for activating regulatory proteins to initiate specific events in the cell cycle?

Accepted Answer

Cyclins

Question 20

A cell in the stomach lining is constantly exposed to harsh gastric juices and must be replaced frequently. Which process is primarily responsible for this replacement?

Accepted Answer

Mitosis

Mitosis, Meiosis, and Cell Differentiation: Structure, Function, and Regulation

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