Carrier of genes of colour blindness are present in
A haemophilic woman marries a normal man, then
Haemophilia $A$ is due to the absence of
If a man who is colour blind marries a women, who is pure normal for colour vision, the chances of their sons have colour blindness is
Why are thalassemia and haemophilia categorised as Mendelian disorders? Write the symptoms of these diseases. Explain their pattern of inheritance in humans.