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Gauri Sharma posted an Question
September 20, 2022 • 18:06 pm
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- IIT JAM
- Biotechnology (BT)
What is discoidal cleavage? please explain
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Anupriya bandyopadhyay![best-answer]()
Meroblastic cleavage occurs when eggs have a lot of yolk. The egg does not divide completely at each division. Two types: a. Discoidal cleavage is limited to a small disc of cytoplasm at the animal pole. All of the yolk filled cytoplasm fails to cleave (characteristic of telolecithal eggs such as birds). Telolecithal - yolk distributed in gradient, concentrated toward one pole of egg, usually the vegetal pole (e.g. amphibians). b. Superficial cleavage is limited to a thin surface area of cytoplasm that covers the entire egg. The inside of the egg that is filled with yolk fails to cleave (centrolecithal eggs such as insects).