Fusion of the sperm and egg plasma membranes follows which of the following events?Multiple choice question.Completion of meiosisPenetration of the plasma membrane of an unfertilized egg by a spermRemoval of sperm receptors from the outer coat of the eggChange in the membrane potential of the egg
Question
Fusion of the sperm and egg plasma membranes follows which of the following events?Multiple choice question.Completion of meiosisPenetration of the plasma membrane of an unfertilized egg by a spermRemoval of sperm receptors from the outer coat of the eggChange in the membrane potential of the egg
Solution
The fusion of the sperm and egg plasma membranes follows the event of "Penetration of the plasma membrane of an unfertilized egg by a sperm".
Here's a step-by-step explanation:
- The sperm approaches the egg.
- The sperm penetrates the outer layers of the egg, including the plasma membrane. This is facilitated by enzymes located in the acrosome (a structure in the sperm's head).
- Once the sperm has penetrated these layers, the plasma membranes of the sperm and egg can fuse. This allows the sperm's genetic material to enter the egg.
- After this fusion, the egg undergoes changes that prevent other sperm from penetrating it. This includes changes in the membrane potential of the egg and removal of sperm receptors from the outer coat of the egg.
- Finally, the egg completes meiosis and the nuclei of the sperm and egg fuse, creating a zygote with a complete set of chromosomes.
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