A woman with two genes for haemophilic and a gene for colour blindness on one of the X-chromosome marries a normal man.How will the progeny 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
