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

- Once a sperm penetrates the ovum, a chemical reaction occurs, forming a fertilization membrane. 
- This fertilization membrane prevents the entry of additional sperms, ensuring monospermy.