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Cleavage in mammals is
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Medium
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Solving time: 3 mins

Cleavage in mammals is

A
holoblastic equal

B
holoblastic unequal

C
superficial

D
discoidal.

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33 Years NEET-AIPMT Chapterwise Solutions - Biology 2020 (MTG)

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Cleavage in mammals is holoblastic unequal. Mammals have microlecithal eggs so they have holoblastic cleavage in which the segmentation lines pass through the entire egg, dividing it completely. As the eggs are microlecithal so one would expect that first cleavage will produce two equal blastomeres. But, this is not the case. The two blastomeres produced are unequal which divide further to form 4 unequal blastomeres and this process continues to form a ball of cells called morula. Superficial cleavage occurs in insects and discoidal cleavage occurs in birds.
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Question Text
Cleavage in mammals is
TopicAnimal Kingdom
SubjectBiology
ClassClass 11
Answer TypeText solution:1
Upvotes57