The blastodisc or germinal disc refers to the | vedclass

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(B) The blastodisc (or germinal disc) is a small,circular,white spot on the surface of a yolk-rich egg where the cytoplasm is concentrated and cleavag

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Avian egg

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(B) The blastodisc (or germinal disc) is a small,circular,white spot on the surface of a yolk-rich egg where the cytoplasm is concentrated and cleavage occurs. In telolecithal eggs,such as those found in birds (avian eggs),the massive amount of yolk restricts the active cytoplasm to a small disc-like area at the animal pole,known as the blastodisc. Therefore,the blastodisc is characteristic of avian eggs.

The blastodisc or germinal disc refers to the protoplasm of the egg,which is restricted to a small area in:

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