Question

A female has haemophilic brother and parents having nonual blood clotting. She marries a male who has no history of haemophilia in his family. What is the possibility of her children having this disease?

पर्याय

• 50% of the sons may be haemopbilic.

• All the progeny will be baemophilic.

• 50% of the total generation is haemophilic.

• 50% of the daughters may be haemophilic.

Answer 1

50% of the sons may be haemopbilic.

Explanation:

Their mother must be a carrier of the disease because the woman has a haemophilic sibling. The recessive gene would subsequently be passed on to her children. In males, a single recessive gene is enough to cause haemophilia, hence the brother is haemophilic. To manifest the disease in females, a double recessive condition is required. As a result, the lady is simply a carrier because she only has one recessive gene.