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Cleavage in mammals is
Option: 1
Holoblastic equal
Option: 2
Holoblastic unequal
Option: 3
Superficial
Option: 4
discoidal
Answers (1)
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..
- Also, In mammals, the zygote divides into equal blastomeres and thus, cleavage is called holoblastic equal.
Significance of Cleavage:
- Cleavage distributes the cytoplasm of the zygote amongst the blastomeres.
- It allows for morphogenetic movements necessary for cell differentiation, germ layer formation and tissue and organ formation.
- It converts the unicellular zygote into a multicellular organism
Hence the correct option is (a).
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