Asked by  | 22nd Jun, 2009, 01:27: PM

Expert Answer:

Depending mostly on the amount of yolk in the egg, the cleavage can be holoblastic (total or entire cleavage) or meroblastic (partial cleavage). The mammalian eggs are isolecithal i.e. with a small even distribution of yolk. Embryos formed from such eggs show holoblastic cleavage. This is a major pattern of embryonic cell divison in which cytokinesis completely separates cells during division. As a result, the blastomeres are completely separated. Here, the entire egg participates in cell division.


Answered by  | 23rd Jun, 2009, 01:32: PM

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