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NEET2016ZoologyPrinciples of Inheritance and VariationActual

If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is

Options

  1. A0%
  2. B50%
  3. C75%
  4. D100%

Correct answer

A. 0%

Step-by-step solution

Colour blindness is an X-linked recessive disease and shows criss-cross inheritance. If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is 0%. 100% - carrier daughters (Phenotypically normal) 100% - Normal son

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