Question

Teena's father bas haemophilia which is an X-linked recessive trait, but her husband has normal blood clotting. What is the chance her son will have the disease?

Options

• 0%

• 25%

• 50%

• 100%

Answer 1

50%

Explanation:

Haemophilia, commonly known as bleeder's disease, is a sex-related disorder. Since Teena's father has passed away,

According to the inheritance, haemophilia is a blood disorder.

Teena will be a haemophilia carrier daughter with a single recessive haemophilia gene. When

When a tougher woman marries a regular guy,

Then 50% of sons will be normal, but 50% of daughters would be abnormal.

Haemophilia will be present in both sons. In a similar vein, 50% of

Daughters are going to be normal.