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What is true for cleavage : -
A
Size of embryo increase
B
Size of cells decrease
C
Size of cells increase
D
Size of embryo decrease
Detailed Solution
Cleavage is the series of rapid mitotic divisions of the zygote that form a multicellular embryo (morula and then blastula).
There is no growth between the divisions (the interphase is very short), so the overall size of the embryo remains about the same as that of the zygote.
As the same volume is divided into more and more cells (blastomeres), each cell becomes smaller.
So during cleavage the size of the cells decreases.
There is no growth between the divisions (the interphase is very short), so the overall size of the embryo remains about the same as that of the zygote.
As the same volume is divided into more and more cells (blastomeres), each cell becomes smaller.
So during cleavage the size of the cells decreases.