Q. If a colourblind woman marries a normal visioned man, their sons will be :
A) all normal visioned
B) one-half colourblind and one-half normal
C) three-fourths colourblind and one-fourth normal
D) all colourblind
Explanation
[Solution from source] A colourblind woman is XᶜXᶜ, so every son gets an X carrying the colourblind allele from her and a Y from the father; all sons are colourblind. The daughters would be carriers with normal vision. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.