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What is true for cleavage? (a) size of embryo increases (b) size of cells decreases (c)...

What is true for cleavage?

(a) size of embryo increases

(b) size of cells decreases

(c) size of cells increases

(d) size of embryo decreases.

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Answer #1

The correct option is (b) size of cells decreases.

Cleavage involves repeated cell division without increase in size. But cell size decrease.

The cleavage describes a series of rapid mitotic divisions of the zygote following fertilization and forms a many-celled blastula. Interphase in cleavage divisions is short and does not involve development, hence so the resulting blastomeres become smaller in size as their number increases. Therefore, the size of the cells does not increase during the process of cleavage.

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