Q. Haemophilia is more commonly seen in human males than in human females because :
A) this disease is due to an X-linked dominant mutation
B) a greater proportion of girls die in infancy
C) this disease is due to an X-linked recessive mutation
D) this disease is due to a Y-linked recessive mutation
Explanation
[Solution from source] Haemophilia is X-linked recessive. Males have one X, so one mutant allele causes the disease, while females need two copies and are usually carriers. A Y-linked trait would never appear in females at all. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.