Question

Which of the following is true in the process of fertilization?

• A. Only one sperm reaches the egg and enters it.
• B. The entry of sperm activates the egg for completing meiosis.
• C. Two haploid nuclei fuse and immediately divide to produce two nuclei, which are again haploid.
• D. Only the acrosome of the sperm enters the egg.

Answer 1

The correct option is B The entry of sperm activates the egg for completing meiosis.

Fertilization is the fusion of gametes (male and female) to develop a new individual organism.
After male ejaculation, sperm moves to meet ovum. They interact in the fallopian tube. The zona pellucida that surrounds the egg binds to the sperm and the binding initiates the acrosomal reaction. The egg activates itself and completes meiosis.
Thus, the correct answer is (B), 'The entry of sperm activates the egg for completing meiosis'.