Question

Cleavage differs from mitosis because

• A. In cleavage there is no growth phase
• B. In cleavage consumption of $O_2$ increases
• C. In cleavage nucleus-cytoplasmic ratio increases
• D. All the above

Answer 1

The correct option is D All the above

Sr. no.	Cleavage	Mitosis
1.	Cleavage is the process of division of the cytoplasm (cytokinesis) in animal cells.	In mitosis nucleus divides into two identical nuclei.
2.	In cleavage nucleus: cytoplasmic ratio increases.	In mitosis nucleus: cytoplasmic ratio remains same.
3.	Cleavage is a very rapid process, hence O2 consumption is very high.	O2 consumption in mitosis is low, as the process is slow.
4.	Growth phase does not occur in cleavage.	Growth occurs during interphase.
5.	Site of occurence: In zygote, or parthenogenic egg (reproductive cells).	Site of occurence: In somatic cells (non-reproductive cells).
6.	DNA synthesis is faster.	DNA synthesis is slower.