Consider the following: A. The reductive division for the human female gametogenesis starts earlier than that of the male gametogenesis. B. The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females. C. The first polar body is associated with the formation of the primary oocyte. D. Luteinizing Hormone (LH) surge leads to disintegration of the endometrium and onset of menstrual bleeding. Choose the correct answer from the options given below: (NEET 2025)

Solution & Explanation

Answer: (C) A and B are true Solution: A is true — the reductive (meiotic) division in females begins in the embryonic stage (primary oocytes arrested in prophase-I), far earlier than in males where it begins at puberty. B is true — in males meiosis I and II run continuously over days, whereas in females meiosis I completes near ovulation and meiosis II only at fertilisation, a much longer gap, so the gap is much shorter for males. C is false because the first polar body forms when the primary oocyte completes meiosis I to give the secondary oocyte (not the primary oocyte). D is false because the LH surge causes ovulation, not endometrial disintegration. NCERT Reference: Ch 2, p.32, line 31 — "Oogenesis is initiated"