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.