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A change in the amount of yolk and its distribution in the egg will affect:

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

Correct answer: Pattern of cleavage

Solution

Yolk amount and distribution determine how cleavage occurs because yolk resists division and alters where cleavage furrows can pass. This changes the pattern of cleavage, not fertilization or zygote formation.

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