In a 'telolecithal' egg, such as a bird's egg, the cleavage is restricted to a small disc of cytoplasm. This type of cleavage is called:
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Correct answer: Meroblastic cleavage
Meroblastic (incomplete) cleavage occurs in eggs with large amounts of yolk. The yolk prevents the cleavage furrows from passing through the entire egg, so only the blastodisc at the animal pole undergoes division.
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