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NEET 2018 · BiologyPrevious Year Question

A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by

Answer: (D) Both sons and daughters. Answer: (D) Both sons and daughters Solution: A woman is XX and passes one of her two X chromosomes to each child regardless of the child's sex — sons receive her X (plus the father's Y) and daughters receive her X (plus the father's X).

  1. A.Only grandchildren
  2. B.Only sons
  3. C.Only daughters
  4. D.Both sons and daughters✓

Correct Answer

(D) Both sons and daughters

Solution & Explanation

Answer: (D) Both sons and daughters Solution: A woman is XX and passes one of her two X chromosomes to each child regardless of the child's sex — sons receive her X (plus the father's Y) and daughters receive her X (plus the father's X). Therefore an X-linked allele on one of her X chromosomes can be inherited by both sons and daughters. NCERT Reference: NCERT Class XII, Ch 4, p.71, lines 18-19: "Females, however, produce only one type of ovum with an X-chromosome."

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