Fertilization of an egg with more than one sperm
A) produces a zygote that cannot develop.
B) is evolutionarily advantageous because it increases genetic variability.
C) is frequently allowed to happen by the zona pellucida.
D) produces a zygote with too many mitochondria.

Question

Quizplus · Accepted Answer

Fertilization of an egg with more than one sperm, known as polyspermy, results in a zygote with an abnormal number of chromosomes, which typically cannot develop properly. The zona pellucida helps prevent polyspermy by undergoing changes that block additional sperm from entering the egg once the first sperm has penetrated.

Fertilization of an Egg with More Than One Sperm