After entry of sperm into cytoplasm of ovum which of the following event takes place?
Correct answer: D. Meiotic division of secondary oocyte
- A. Mitotic division of secondary oocyte
- B. Meiotic division of primary ooeyte
- C. Mitotic division of primary oocyte
- D. Meiotic division of secondary oocyte
Explanation
When a sperm enters the cytoplasm of an ovum, it triggers the completion of the second meiotic division in the ovum, which was previously arrested at the metaphase stage of meiosis II. This results in the formation of a mature ovum and a second polar body. Hence, option D is correct.
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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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