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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): In human females, the completion of the second meiotic division occurs in the fallopian tube. Reason (R): The secondary oocyte completes meiosis II spontaneously immediately after ovulation, prior to the entry of a sperm. In the light of the above statements, choose the most appropriate answer from

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

C. (A) is true but (R) is false

Step-by-step solution

Assertion (A) is true. Unlike the first meiotic division which completes in the ovary, the secondary oocyte is released while arrested in metaphase II. It travels to the fallopian tube (ampullary region), where the completion of the second meiotic division takes place. Reason (R) is false. The secondary oocyte does not complete meiosis II spontaneously. The completion of the second meiotic division is strictly induced by the entry of a sperm into the ovum. If fertilization does not occur, the secondary oocyte degen

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