A normal-visioned man whose father was colour-blind, marries a woman whose father was also colour-blind. They have their first child as a daughter. What are the chances that this child would be colour-blind ?

Question

Dr. Abubacker · Accepted Answer

[Solution from source] The man has normal vision, so his X chromosome carries the normal allele; every daughter receives this X from him. The woman, whose father was colour-blind, is a carrier, but the daughter can be at most a carrier, so her chance of being colour-blind is zero. Answer (3).

Q. A normal-visioned man whose father was colour-blind, marries a woman whose father was also colour-blind. They have their first child as a daughter. What are the chances that this child would be colour-blind ?

Explanation

Reviewed by Dr. Abubacker

Want to attempt the full paper?