If a colour blind man marries a woman who is homozygous for normal vision, the probability of their son being colour blind is .........
$100\%$
$0\%$
$0.5\%$
$25\%$
The female children of a haemophilic man and a carrier woman are likely to be
Colour blindness in man is
A person may have one gene for normal haemoglobin and one gene for sickle cell haemoglobin. This heterozygous condition is called
A woman with normal vision, but whose father was colour blind, marries a colour blind man. Suppose that the fourth child of this couple was a boy. Thus boy
In the above pedigree, assume that no outsider marrying in, carry a disease. Write the genotypes of $C$ and $D$.