Q163 / 180 · NEET 2018 · Zoology

A woman has X-linked condition on one of her X chromosomes. These chromosomes can be inherited by:

  • A
    Only grandchildren
  • B
    Only sons
  • C
    Only daughters
  • Correct answer
    D
    Both sons and daughters

Solution

The woman is the carrier of X-linked condition, and she can transmit the carrier allele to both her son and daughter, The resulting son will become diseased because X-linked disorder always affect males due to the presence of single X-chromosome.

The daughter offspring will become a carrier but not diseased because females are affected by X-linked disorder in homozygous recessive condition, i.e. two recessive alleles are required.

Figure

 

Hence, the correct answer is option: 'D'.

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