A:
Capacitation, Activation Of Eggs, Acrosomal Reaction, And Entry Of Sperm In Egg
B:
Capacitation, Acrosomal Reaction, Activation Of Egg And Entry Of Sperm In Egg
C:
Acrosomal Reaction, Activation Of Egg, Capacitation And Entry Of Sperm In Egg
D:
Activation Of Egg, Acrosomal Reaction, And Entry Of Sperm In Egg And Capacitation
Explanation
B: Capacitation, Acrosomal Reaction, Activation Of Egg And Entry Of Sperm In Egg is the correct sequence of events during fertilization in mammals.
The process of fertilization in mammals involves several steps, including capacitation, the acrosomal reaction, activation of the egg, and entry of the sperm into the egg. The correct sequence of these events is:
Capacitation: This is a process that occurs in the female reproductive tract, where the sperm undergoes changes that enable it to penetrate the egg.
Acrosomal reaction: The acrosome is a structure at the tip of the sperm that contains enzymes. During the acrosomal reaction, these enzymes are released to digest the protective layers around the egg.
Activation of egg: The entry of the sperm triggers a series of changes in the egg's membrane, making it impenetrable to other sperm and initiating the fusion of the egg and sperm nuclei.
Entry of sperm in egg: Finally, the sperm enters the egg and their genetic material combines to form a zygote.
Option A is incorrect because the activation of the egg should occur after the acrosomal reaction.
Option C is incorrect because the acrosomal reaction should occur before the activation of the egg.
Option D is incorrect because capacitation should occur before the acrosomal reaction.
