Which of the following does not generally occur?

Question

Question 11 options:

A)

Two different sperm both fertilizing the same egg

B)

Two sperm fertilizing two different eggs at the same time

C)

A fertilized egg splitting into two embryos

D)

A single sperm fertilizing a single egg

Answer 1

The option that does not generally occur is:

A) Two different sperm both fertilizing the same egg

This scenario typically does not happen because once one sperm successfully fertilizes an egg, a series of biochemical changes occur that prevent other sperm from entering the egg. This process is known as polyspermy prevention, which ensures that only one sperm fertilizes one egg, leading to a proper diploid zygote.