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NEETZoologyHuman Reproduction

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Unlike spermatogenesis, oogenesis is a discontinuous process characterized by long periods of meiotic arrest. Reason (R): In human females, primary oocytes formed during fetal life remain arrested in prophase-I and complete the first meiotic division only starting from puberty, while the secondary

Options

  1. ABoth (A) and (R) are true and (R) is the correct explanation of (A)
  2. BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
  3. C(A) is true but (R) is false
  4. D(A) is false but (R) is true

Correct answer

A. Both (A) and (R) are true and (R) is the correct explanation of (A)

Step-by-step solution

Assertion (A) is correct because oogenesis is indeed a discontinuous process with prolonged meiotic arrests, unlike spermatogenesis which is a continuous process beginning at puberty. Reason (R) is correct and provides the exact mechanism for this discontinuity: primary oocytes arrest in prophase-I during fetal life and only resume meiosis starting at puberty, and the resulting secondary oocytes arrest in metaphase-II, completing meiosis only if fertilization occurs. Thus, Reason (R) correctly explains Assertion (A

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