Question

Cleavage differs from normal mitotic divisions as

• A. There is no nuclear division during cleavage.
• B. There is no division of cytoplasm during cleavage.
• C. There is no growth phase between the cleavages.
• D. The division of cytoplasm follows nuclear division.

Hint:

During cleavage the cells do not grow between divisions, so blastomeres get smaller.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept
Cleavage is the series of rapid mitotic divisions of the zygote that forms the blastula.

Step 2: What is common
Both nuclear division and cytoplasmic division take place in cleavage, and cytokinesis follows karyokinesis in all mitosis.

Step 3: What is different
In cleavage the interphase is very short and has no growth phase.
So the blastomeres become smaller while the embryo keeps the same size.

Final Answer:
Cleavage differs from normal mitosis because there is no growth phase between divisions. \[ \boxed{\text{(C) }\text{There is no growth phase between the cleavages.}} \]