Choose incorrect statement for haemophilia.

A normal­visioned man whose father was colour­ blind, marries a woman whose father was also colour­blind. They have their first child as a daughter. What are the chances that this child would be colour­ blind ?

Select the incorrect statement with regard to haemophilia.

Sickle -cell anaemia has not been eliminated from the African population because it

Why are thalassemia and haemophilia categorised as Mendelian disorders? Write the symptoms of these diseases. Explain their pattern of inheritance in humans.