question_answer

A normal woman whose father was colourblind is married to a normal man. The sons would be

A)  75% colourblind

B)  50% colourblind

C)  all normal      

D)  all colourblind

Correct Answer: B

Solution :

The genotype of normal woman with colourblind father\[=X{{X}^{h}}\] The genotype of normal man\[=XY\] \[\therefore \]50% of the sons would be colourblind.