Cell Division MCQ Quiz: Exam!

1. During which phase of mitosis do the chromosomes line up along the equator (middle) of the dividing cell?

Metaphase

Telophase

Anaphase

Prophase

Chromosomes are pulled to the equator (middle) of the cell during metaphase. Metaphase = Middle

Explanation

Chromosomes are pulled to the equator (middle) of the cell during metaphase. Metaphase = Middle

2. These diagrams represent different stages of animal cell division.

From start to finish, what is the correct order of the stages?

2, 4, 3, 1

2, 3, 4, 1

3, 2, 1, 4

3, 1, 2, 4

Prophase (chromosomes condense & nuclear membrane disappears) Metaphase (chromosomes line up in the MIDDLE) Anaphase (chromosomes are pulled APART) Telophase (2 nuclear membranes form & cytokinesis occurs

Explanation

Prophase (chromosomes condense & nuclear membrane disappears) Metaphase (chromosomes line up in the MIDDLE) Anaphase (chromosomes are pulled APART) Telophase (2 nuclear membranes form & cytokinesis occurs

3. Which of the following has the stages of the cell cycle in the correct sequence?

G1, G2, S, Prophase, Anaphase, Metaphase, Telophase, Cytokinesis

G1, S, G2, Prophase, Metaphase, Anaphase, Telophase, Cytokinesis

G1, S, G2, Cytokinesis, Prophase, Metaphase, Anaphase, Telophase

S, G1, G2, Metaphase, Anaphase, Telophase, Prophase, Cytokinesis

I = Interphase (G1, S, G2)
Play = Prophase
My = Metaphase
Accordion = Anaphase
To = Telophase
Cats = Cytokinesis

Explanation

I = Interphase (G1, S, G2)
Play = Prophase
My = Metaphase
Accordion = Anaphase
To = Telophase
Cats = Cytokinesis

4. Which of the following is a TRUE about the events of the cell cycle?

The M phase is usually the longest phase.

Interphase consists of the G1, S, and, G2 phases.

Little happens during the G1 and G2 phases.

DNA replicates during cytokinesis.

Interphase is the longest stage of the cell cycle consisting of G1 (growth), S (DNA replication) and G2 (preparation for mitosis).

Explanation

Interphase is the longest stage of the cell cycle consisting of G1 (growth), S (DNA replication) and G2 (preparation for mitosis).

5. During which phase of mitosis do spindle fibers separate (pull apart) sister chromatids?

Anaphase

Metaphase

Prophase

Telophase

Anaphase pulls apart sister chromatids.

Explanation

Anaphase pulls apart sister chromatids.

6.

The region labeled A in Figure 9-1 is called the

Spindle.

Centriole.

Sister chromatid.

Centromere.

A chromosome consists of 2 sister chromatids (B) joined together at the centromere (A).

Explanation

A chromosome consists of 2 sister chromatids (B) joined together at the centromere (A).

7. Which of the following is NOT a correct statement about the events of the cell cycle?

The cell grows during the G1 phase.

Cell division ends with cytokinesis.

DNA replicates during the M phase.

Interphase is usually the longest phase.

DNA replication occurs during the S phase of Interphase. M phase is cell division.

Explanation

DNA replication occurs during the S phase of Interphase. M phase is cell division.

8. Unlike mitosis, meiosis results in the formation of

4 diploid cells.

2 diploid cells.

4 haploid cells.

2 haploid cells.

The purpose of Meiosis is to reduce the chromosome number by half.

Explanation

The purpose of Meiosis is to reduce the chromosome number by half.

9. One difference between cytokinesis in plant cells and in animal cells is that plant cells have

A cell plate.

Chromatin.

Centrioles.

Centromeres

Plant cells have cell walls which prevent the cell membrane from "pinching in" so they build a cell plate to divide the cytoplasm.

Explanation

Plant cells have cell walls which prevent the cell membrane from "pinching in" so they build a cell plate to divide the cytoplasm.

10. What is the purpose of mitosis?

To produce 2 cells, each with 2 complete sets of chromosomes

To produce 2 cells, each with half the normal number of chromosomes

To produce 4 cells, each with 2 complete sets of chromosomes

To produce 4 cells, each with half the normal number of chromosomes

Mitosis produces 2 diploid cells. Meiosis produces 4 haploid cells.

Explanation

Mitosis produces 2 diploid cells. Meiosis produces 4 haploid cells.

11. During what stage of Meiosis does crossing over occur?

Between Prophase I and Anaphase I

Between Prophase II and Anaphase II

During Interphase

Crossing over only occurs during Mitosis

Crossing over occurs when Homologous Chromosomes pair up during Prophase I and separate during Anaphase I.

Explanation

Crossing over occurs when Homologous Chromosomes pair up during Prophase I and separate during Anaphase I.

12. What occurs during metaphase I of meiosis?

Centromeres of replicated chromosomes line up along the cell’s equator.

Centromeres divide as sister chromatids move toward opposite poles of the cell.

Homologous chromosome pairs line up along the cell’s equator.

Homologous chromosomes move toward opposite poles of the cell.

Metaphase I = homologous chromosomes are pulled to the middle of the cell

Explanation

Metaphase I = homologous chromosomes are pulled to the middle of the cell

13. Which of the following is NOT true of crossing over?

Crossing over occurs when homologous chromosomes exchange genetic material.

Crossing over occurs during DNA replication.

Crossing over increases genetic diversity.

Crossing over usually only occurs during Meiosis.

Crossing over occurs between Prophase I and Anaphase I of Meiosis.

Explanation

Crossing over occurs between Prophase I and Anaphase I of Meiosis.

14. Which of the following is NOT true about mitosis and meiosis?

Mitosis produces somatic cells and Meiosis produces gametes.

There are 2 separate divisions in Meiosis and only 1 division in Mitosis.

Mitosis produces genetically identical cells and Meiosis produces genetically different cells.

DNA replication happens once in Mitosis and DNA replicates twice in Meiosis.

In Meiosis, DNA replication only happens once (during interphase).

Explanation

In Meiosis, DNA replication only happens once (during interphase).

15. Which of the following is a major difference between the production of gametes in males and females?

Males produce 4 viable cells but females only produce 1 viable cell and 3 polar bodies.

Mitosis occurs in males and meiosis occurs in females.

There is no difference between gamete production in males and females.

Cytokinesis is uneven in oogenesis (production of eggs) which produces only one good egg and 3 unusable cells called polar bodies.

Explanation

Cytokinesis is uneven in oogenesis (production of eggs) which produces only one good egg and 3 unusable cells called polar bodies.

16. Crossing-over does not occur in mitosis, unlike meiosis. Which of the following is the likely reason?

Chromatids are not involved in mitosis.

A cell undergoing mitosis does not have homologous chromosomes.

There is no prophase during mitosis.

Homologous chromosomes do not pair up during mitosis.

Homologous chromosomes pair up during meiosis in order to exchange genes and ensure that each of the 4 gametes produced have 1 copy of each gene. Mitosis produces genetically identical cells so all of the chromosomes line up independently on the spindle.

Explanation

Homologous chromosomes pair up during meiosis in order to exchange genes and ensure that each of the 4 gametes produced have 1 copy of each gene. Mitosis produces genetically identical cells so all of the chromosomes line up independently on the spindle.

17. During what phase of meiosis does nondisjunction occur?

Metaphase I

Anaphase I

Prophase II

Metaphase II

Nondisjunction occurs when either Homologous Chromosomes fail to separate in Anaphase I or when Sister Chromatids fail to separate in Anaphase II.

Explanation

Nondisjunction occurs when either Homologous Chromosomes fail to separate in Anaphase I or when Sister Chromatids fail to separate in Anaphase II.

18. At what point are the cells in Meiosis first considered haploid?

Prophase I

Prophase II

Telophase II

Haploid cells are NOT present throughout in meiosis.

At the end of Telophase I (and through all of Meiosis II), the cells are haploid.

Explanation

At the end of Telophase I (and through all of Meiosis II), the cells are haploid.