Question

Identify wheather the given statements are the characteristic of cleavage or typical mitosis.
I. DNA synthesis occurs at the normal rate.
II. Nuclear/cytoplasm ratio increases as cleavage Progresses
III. Size of daughter cells decrease
IV. Interphase is long

• A. Cleavage - I, II. Typical mitosis - Ill, IV
• B. Cleavage - I. Typical mitosis - II, III, IV
• C. Cleavage - II. Typical mitosis - I, III, IV
• D. Cleavage - II, Ill. Typical mitosis - I, IV

Answer 1

The correct option is D Cleavage - II, Ill. Typical mitosis - I, IV

Cleavage is the series of cell division in zygote during the embryo development. In this process, blastula formation takes place. During this rapid cell division, the number of cells and nuclear mass increases without increasing the cytoplasmic mass. Thus, in each successive division, there is half cytoplasmic content in the cell that decreases the size of the daughter cell. Thus, the ratio of nuclear and cytoplasmic volume increases as the cleavage progress. Mitosis is the process of equational division which has the short period but interphase of mitosis is the longest one. During interphase, cell prepares itself for division by producing protein, cytoplasmic organelle, and DNA at a normal rate. Thus, the correct answer is 'Cleavage - II, Ill. Typical mitosis - I, IV'