Cleavage in bird's egg is

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(C) The egg of a bird is macrolecithal (large amount of yolk) and telolecithal (yolk concentrated at one pole).Due to the presence of a massive amount

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Discoidal meroblastic

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(C) The egg of a bird is macrolecithal (large amount of yolk) and telolecithal (yolk concentrated at one pole).Due to the presence of a massive amount of yolk,the cleavage furrow cannot penetrate the entire egg.Therefore,the cleavage is restricted to a small disc-like area of the cytoplasm at the animal pole,which is known as discoidal meroblastic cleavage.This type of cleavage is characteristic of reptiles,birds,and monotreme mammals.

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