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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): The head of a mature human sperm contains an elongated haploid nucleus. Reason (R): The sperm must contribute half of the genetic material to restore the diploid chromosome number in the zygote during fertilisation. In the light of the above statements, choose the most appropriate answer from the o

Options

  1. ABoth (A) and (R) are correct but (R) is not the correct explanation of (A)
  2. B(A) is correct but (R) is not correct
  3. C(A) is not correct but (R) is correct
  4. DBoth (A) and (R) are correct and (R) is the correct explanation of (A)

Correct answer

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

Step-by-step solution

The head of a mature human sperm contains an elongated haploid nucleus, which carries the paternal genetic material. Thus, the Assertion is correct. The biological significance of the nucleus being haploid is that during fertilisation, the fusion of a haploid sperm and a haploid ovum restores the diploid chromosome number in the resulting zygote. Therefore, the Reason is correct and provides the exact biological explanation for the haploid nature of the sperm nucleus. Hence, both (A) and (R) are correct and (R) is

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