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NEET2004ZoologyPrinciples of Inheritance and VariationActual

The recessive genes located in X chromosome humans are always:

Options

  1. Alethal
  2. Bsub-lethal
  3. Cexpressed in males
  4. Dexpressed in females.

Correct answer

C. expressed in males

Step-by-step solution

In human, male sex chromosome is hemizygous, XY while female are homozygous XX . Thus, any recessive gene present on X chromosome will get expressed in male. In female, those genes can only be expressed if present in homozygous recessive condition on both X-chromosomes.

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