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What layer of egg cell prevents entry of other sperms?(a) Corpus luteum(b) Zona pellucida(c) Endometrium(d) Corona radiataI have been asked this question in an internship interview.This is a very interesting question from Human Reproduction topic in portion Human Reproduction of Biology – Class 12

Answer»

Correct OPTION is (B) Zona pellucida

To elaborate: The sperm contacts the egg cell at zona pellucida. The zona pellucida then UNDERGOES chemical changes which renders egg insusceptible to further encounters with another sperm. This is ESSENTIAL to ensure that only a single sperm fertilizes the egg.



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