How does zona pellucida of ovum help in preventing polyspermy ?
How does zona pellucida of ovum help in preventing polyspermy ?
When a sperm enters into an ovum then it causes changes in cytoplasm so extra cells are prevented by zona pellucida. Thus it makes the fertilization of sperm and ovum possible. Polysperms prevents more sperms
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- [AIIMS 2009]