Thalassaemia is
Autosomal recessive disease
Autosomal dominant disease
Sex-linked dominant disease
Sex-linked recessive disease
A colourblind daughter is born when
A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind ?
Colour blindness is found more in males than in females because
Among symbol $A, B$ and $C, C$ indicates