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Amount of yolk and its distribution are changed in the egg. Which one is affected?

1. Pattern of cleavage
2. Formation of zygote
3. Number of blastomeres
4. Fertilisation

Correct answer: Pattern of cleavage

Solution

The amount and distribution of yolk determine the type of cleavage because yolk physically resists division. Different yolk patterns lead to different cleavage patterns, while fertilisation and zygote formation are not directly changed by yolk distribution.

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