The number of chromosomes in a mature gamete gets halved during:
Correct answer: C. Formation of first polar body
- A. Meiosis II
- B. Division of secondary oocyte and secondary spermatocyte
- C. Formation of first polar body
- D. Formation of second polar body
Explanation
The correct answer is:c) Formation of the first polar bodyDuring oogenesis (the process of egg cell development), the primary oocyte undergoes Meiosis I to produce a secondary oocyte and a smaller cell called the first polar body. The first polar body contains half the number of chromosomes as the original cell. However, it does not carry the potential to develop into a mature egg.
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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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