Home
Class 12
BIOLOGY
A reaction fo granules content which har...

A reaction fo granules content which harden the zona pellucida and ensures sure block to polyspermy is

A

acrosomal reaction

B

cortical reaction

C

acrosin reaction

D

binding reaction

Text Solution

Verified by Experts

The correct Answer is:
B
Immediately after the fusion of sperm and egg plasma membranes, the egg shows a cortical reaction. In this reaction . In this reaction, the cortical granules present beneath the egg's plama membrane fuse with the plama membrane and release enzymes between it and zona pellucida. These enzymes harden the zona pellucida, which now functions to block polyspermy.
Promotional Banner

Similar Questions

Explore conceptually related problems

How does zona pellucida of ovum help in preventing polyspermy?

Fill up the blanks in the following paragraph by selecting the correct option. During copulation (coitus) semen is released by the penis into the vagina and is called (i)._____.the ovum released by the ovary is transported to the (ii)._____where (iii).______takes place during fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes in the membrane that block the entry of (iv)._____The secretions of the (v)._____help the sperm enter into the cytoplasm of the ovum.

Which of the following layers of the ovum undergoes changes to prevent polyspermy when sperm contacts with it ? (a) Corona radiata (b) Plasma membrane (c) Zona pellucida (d) Tunica albuginea