Question

(b) In a human female, probability of an ovum to get fertilized by more than one sperm is impossible. Give reason.

Hint:

The fertilization membrane is a key defense mechanism to ensure only one sperm fertilizes the ovum, preventing polyspermy.

Answer 1

- Upon sperm penetration of the ovum, a chemical reaction triggers the formation of a fertilization membrane.
- This membrane acts as a barrier, blocking further sperm entry and ensuring monospermy.