question_answer

A normal woman whose father was a colour blind person is married to a normal man. Her  sons would likely to be

A)  75% colourblind

B)  50% colourblind                                

C)  All normal      

D)  All colourblind

Correct Answer: B

Solution :

A normal woman, whose father was colourblind will be carrier for the disease.  When she is married to a normal man  then? Thus, their 50% sons would be colourblind.