Cell Cycle And Cell Division Chapter-Wise Test 12

Correct answer Carries: 4.

Wrong Answer Carries: -1.

What happens during cytokinesis in an animal cell?

A cell plate forms
A cleavage furrow forms
Chromosomes condense
Homologous chromosomes separate
2

In animal cells, cytokinesis occurs by the formation of a cleavage furrow, which deepens to divide the cell into two.

Which of the following occurs during anaphase I but not in anaphase of mitosis?

Sister chromatids separate
Homologous chromosomes separate
Spindle fibers attach to kinetochores
Chromosomes move toward opposite poles
2

During anaphase I, homologous chromosomes separate, while in mitotic anaphase, sister chromatids separate.

Which of the following statements about meiosis II is correct?

Meiosis II reduces the chromosome number
Meiosis II involves separation of homologous chromosomes
Meiosis II resembles mitosis
Meiosis II produces diploid daughter cells
3

Meiosis II is similar to mitosis in that sister chromatids separate, but it does not reduce the chromosome number further.

What marks the transition from metaphase to anaphase in mitosis?

Condensation of chromosomes
Spindle fiber formation
Separation of sister chromatids
Disintegration of nucleolus
3

During the transition from metaphase to anaphase, sister chromatids separate and begin moving to opposite poles.

Which of the following is correct about interkinesis?

DNA replication occurs in interkinesis
Interkinesis is a resting phase between meiosis I and II
Chromosomes align at the metaphase plate
Spindle fibers disappear permanently
2

Interkinesis is a short resting phase between meiosis I and II, but no DNA replication occurs.

What is the significance of mitosis?

Formation of gametes
Genetic variability
Growth and repair of tissues
Reduction of chromosome number
3

Mitosis is essential for growth, tissue repair, and asexual reproduction by producing identical cells.

Which of the following is incorrect about telophase I of meiosis?

Nuclear membrane reforms around chromosomes
Cytokinesis may occur
DNA replication occurs before meiosis II
Chromosomes may decondense partially
3

There is no DNA replication between meiosis I and II.

Which stage of meiosis involves crossing over?

Prophase I
Metaphase I
Anaphase I
Telophase I
1

During Prophase I, homologous chromosomes undergo crossing over, increasing genetic diversity.

Which of the following statements about telophase II is incorrect?

Nuclear membrane reforms around each set of chromosomes
Cytokinesis occurs
Four haploid daughter cells are produced
Chromosomes remain condensed
4

During telophase II, chromosomes decondense, and nuclear membranes reform.

Which of the following statements about metaphase I is incorrect?

Homologous chromosomes align at the metaphase plate
Spindle fibers attach to kinetochores
Sister chromatids separate
Independent assortment occurs
3

In metaphase I, homologous chromosomes separate, but sister chromatids remain together.

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