Which of the following is the first step in the process of fertilization?
A) A sperm fuses with the egg's plasma membrane.
B) The sperm nucleus enters the egg, and the egg immediately prevents any further sperm from gaining access by forming a fertilization membrane that a sperm cannot penetrate.
C) The nuclei of the sperm and egg rupture within the fertilized egg and the chromosomes mix to form a single nucleus.
D) The capacitated sperm release their acrosomal enzymes to penetrate through the cells surrounding the egg.

Question

Quizplus · Accepted Answer

There are four steps in the process of fertilization: 1) The capacitated sperm release their acrosomal enzymes to penetrate through the cells surrounding the egg; 2) A sperm fuses with the egg's plasma membrane; 3) The sperm nucleus enters the egg, and the egg immediately prevents any further sperm from gaining access by forming a fertilization membrane that sperm cannot penetrate - Granules inside the egg form this membrane - The fertilization membrane is important in order to establish the correct number of chromosomes in the fertilized egg (just 46); 4) The nuclei of the sperm and egg rupture within the fertilized egg and the chromosomes mix to form a single nucleus - The cell is now called a zygote.

Which of the Following Is the First Step in the Process