If a colour blind lady marries a normal man, their children will be

Colour blindness is found more in males than in females because

If a character is always transmitted directly from a father to all his sons and from their sons to all their sons, then which chromosome carries the gene for the character

Given below is a highly simplified representation of the human sex chromosomes from a karyotype. The gene $'a'$ and $'b'$ could be of

Haemophilia $A$ is due to the absence of