How is polyspermy prevented during the fertilization of an egg?
A) the corona radiata hardens
B) the ZP3 glycoproteins are inactivated
C) the egg secretes toxins that kill other penetrating sperms
D) the acrosomal enzymes harden the zona pellucida
E) the cell membrane of the oocyte polarizes

Question

Quizplus · Accepted Answer

The ZP3 glycoproteins on the zona pellucida of the egg are responsible for sperm recognition and binding. Once a sperm binds to the ZP3 proteins, it triggers a series of changes in the egg's membrane that prevent other sperm from binding and fertilizing the egg. This process is called the cortical reaction, and it involves the inactivation of ZP3 proteins.

How Is Polyspermy Prevented During the Fertilization of an Egg