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NEETZoologyPrinciples of Inheritance and Variation

A colour-blind man with blood group O marries a woman with normal vision and blood group AB. The woman's father was colour-blind. What is the probability that their child will be a colour-blind male with blood group A?

Options

  1. A1 8
  2. B1 4
  3. C1 16
  4. D1 2

Correct answer

A. 1 8

Step-by-step solution

The man is colour-blind and has blood group O. His genotype is X^c Y ii . The woman has normal vision but her father was colour-blind ( X^c Y ), meaning she must have inherited the colour blindness allele from him and is a carrier. Her blood group is AB. Her genotype is X^C X^c I^A I^B . Considering the blood group inheritance independently: Cross: ii I^A I^B Offspring: 1 2 I^A i (Blood group A) and 1 2 I^B i (Blood group B). Probability of the child having blood group A = 1 2 . Considering the colour blindness inh

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