A colour blind son will born when
Mother is normal and father normal
Mother is colour blind and father normal
Mother is normal and father is colour blind
All the cases are correct
Colour blindness is found more in males than in females because
In pedigree analysis, symbol given for sex unspecified is
Haemophilia $A$ is due to the absence of
The daughter born to haemophilic father and normal mother could be
A normal woman, whose father was colour-blind is married to a normal man. The sons would be