Question

A woman with two genes, one for haemophilia and one for colour blindness on one of its X-chromosomes marries a normal man. The progeny will be

• A. All sons haemophilic and colour blind
• B. 50% haemophilic and colour blind sons and 50% normal sons
• C. All daughters haemophilic and colour blind
• D. 50% haemophilic daughters and 50% colour blind daughters

Answer 1

The correct option is B 50% haemophilic and colour blind sons and 50% normal sons

A woman with two genes, one for haemophilia and one for colour blindness on one of its X-chromosomes
marries a normal man. The progeny will be 50% haemophilic and colour blind sons and 50% normal sons.