Which Membranes Fuse First During Fertilization

Question

Which membranes fuse first during fertilization?
A)cortical granule membrane and egg plasma membrane
B)vitelline layer and sperm plasma membrane
C)sperm plasma membrane and cortical granule membrane
D)sperm plasma membrane and egg plasma membrane
E)jelly coat and sperm plasma membrane

Accepted Answer

During fertilization, the sperm plasma membrane fuses with the egg plasma membrane to allow entry of the sperm into the egg. This is the first and most important fusion event during fertilization.