Mitosis results in producing two cells

Question:

Mitosis results in producing two cells which are similar to each other. What would be the consequence if each of the following irregularities occur during mitosis?

a. Nuclear membrane fails to disintegrate

b. Duplication of DNA does not occur

c. Centromeres do not divide

d. Cytokinesis does not occur

Solution:

a. Nuclear membrane fails to disintegrate, then the spindle fibre would not reach the chromosomes.

b. Duplication of DNA does not occur, then the whole cell cycle would get arrested and will enter an inactive stage called the G0 stag.

c. Centromeres do not divide- Sister chromatids would not split to opposite poles and one daughter cell would get two sister chromatids whereas the other will get none.

d. Cytokinesis does not occur- It will result in polyploidy.

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