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unequal cleavage

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unequal cleavage
[unē′kwəl]
Etymology: ME, un + L, aequare, to make equal; AS, cleofan, to split
mitotic division of a fertilized ovum into blastomeres that are larger near the yolky part of the cell (the vegetal pole) and smaller near the nucleus (the animal pole). Compare equal cleavage.


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At the four cell stage, unequal cleavage is seen in CD resulting in A, B, and C being the equivalent sizes while D is the largest of the four.
 
 
 
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