Extrusion of second polar body from egg nucleus occurs:
Correct answer: A. After entry of sperm before completion of fertilization
- A. After entry of sperm before completion of fertilization
- B. After completion of fertilization
- C. Before entry of sperm
- D. Without any relation of sperm entry
Explanation
After the entry of the sperm into the egg, the egg nucleus undergoes its second meiotic division to form the second polar body. The second polar body is a small cell fragment that does not have the potential to develop further. This process occurs before the completion of fertilization when the sperm's genetic material fuses with the egg's genetic material.
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Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.
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