Question 1

Which of the following best describes the difference in chromosome alignment during metaphase of mitosis versus metaphase I of meiosis?

Accepted Answer

In mitosis, individual chromosomes align at the metaphase plate, while in meiosis I, homologous pairs (bivalents) align at the metaphase plate.

Question 2

A diploid cell with $$2n = 46$$ chromosomes undergoes mitosis. How many chromosomes will each daughter cell have after cytokinesis?

Accepted Answer

$$46$$

Question 3

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

Accepted Answer

S phase

Question 4

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

Accepted Answer

Spindle assembly checkpoint

Question 5

What is the primary function of cyclin-CDK complexes in the cell cycle?

Accepted Answer

To regulate progression through different phases of the cell cycle

Question 6

Which of the following events occurs during prophase I of meiosis but NOT during prophase of mitosis?

Accepted Answer

Synapsis and crossing over between homologous chromosomes

Question 7

If a cell fails the DNA damage checkpoint at G1, what is the most likely outcome?

Accepted Answer

The cell will repair the DNA or undergo apoptosis

Question 8

Which statement best explains why meiosis results in genetically unique daughter cells, while mitosis does not?

Accepted Answer

Crossing over and independent assortment occur during meiosis

Question 9

A cell with a diploid number of chromosomes ($$2n) $$undergoes meiosis. What is the chromosome number in each gamete produced?

Accepted Answer

$$n$$

Question 10

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

Accepted Answer

Kinetochores attach chromosomes to spindle microtubules for segregation

Question 11

Which of the following is TRUE regarding the ploidy level during meiosis?

Accepted Answer

Ploidy level is reduced from diploid to haploid during meiosis I

Question 12

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

Accepted Answer

Crossing over

Question 13

A mutation in a tumor suppressor gene is most likely to result in which of the following?

Accepted Answer

Uncontrolled cell division leading to cancer

Question 14

Which of the following statements about cytokinesis is correct?

Accepted Answer

Cytokinesis results in the formation of two separate daughter cells

Question 15

Which phase of the cell cycle is characterized by cell growth and preparation for DNA replication?

Accepted Answer

G1 phase

Question 16

Which of the following events occurs during anaphase of mitosis?

Accepted Answer

Sister chromatids separate and move to opposite poles

Question 17

Which of the following is a key difference between prokaryotic and eukaryotic cell division?

Accepted Answer

Eukaryotes have their DNA in a nucleus, while prokaryotes have their DNA in the cytoplasm

Question 18

Which of the following best explains the principle of independent assortment?

Accepted Answer

Homologous chromosomes align randomly at the metaphase plate during meiosis I

Question 19

If a cell is unable to form a proper spindle during mitosis, which checkpoint will most likely prevent the cell from proceeding?

Accepted Answer

Spindle assembly checkpoint

Question 20

Which of the following is NOT a function of mitosis in multicellular organisms?

Accepted Answer

Production of gametes

Cell Cycle, Mitosis, and Meiosis: Structure, Regulation, and Genetic Consequences

Guida di studio - Domande di pratica