If the amount and distribution of yolk in the | vedclass

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(A) The pattern of cleavage in an embryo is significantly influenced by the amount and distribution of yolk in the egg. Yolk acts as a physical barrie

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Pattern of cleavage

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(A) The pattern of cleavage in an embryo is significantly influenced by the amount and distribution of yolk in the egg. Yolk acts as a physical barrier to the cleavage furrow. In eggs with little yolk (isolecithal),cleavage is holoblastic (complete). In eggs with a large amount of yolk (telolecithal or centrolecithal),cleavage is meroblastic (incomplete) because the cleavage furrow cannot penetrate the dense yolk. Therefore,the distribution of yolk determines whether the cleavage will be holoblastic or meroblastic.

If the amount and distribution of yolk in the egg change,what is affected?

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