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  • What is true for cleavage?  Option: 1 Size of embryos increases   Option:

What is true for cleavage?
 

Option: 1

Size of embryos increases 
 


Option: 2

Size of cells decreases 
 


Option: 3

Size of cells increases 
 


Option: 4

Size of embryo decreases 
 


Answers (1)

best_answer

Embryonic Development: Cleavage & Formation of Blastocyst -

  • The mitotic division starts as the zygote moves through the isthmus of the oviduct called cleavage towards the uterus and forms 2, 4, 8, 16 daughter cells called blastomeres. 
  • When the blastomeres divide completely the cleavage is called holoblastic cleavage.
  • The embryo with 8 to 16 blastomeres is called a morula.
  • The embryo gradually becomes a 64-celled structure.

Cleavage is mitotic division in which cells divide within the embryo. Hence size of cell decreases but embryo size remains the same

Hence, the correct option is (b).
 

Posted by

Divya Prakash Singh

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