Question

Haemophilia disease in man is linked with

• A. autosomes
• B. $Y$ chromosome
• C. chromosome $21$
• D. $X$ chromosome

Answer 1

Answer: (D)

$X$ chromosome

Answer 2

The correct answer is D:X chromosome
It is more common in males because it is a recessive trait that is carried by the X chromosome. Haemophilia is a genetic disorder that affects the blood’s ability to clot properly that will lead to a prolonged bleeding and difficulty in stooping. It has a deficiency of specific clotting factors that are present in blood. They are of two types, Haemophilia A that is deficient in factor VIII and Hemophilia B that is deficient in factor IX.