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 ?
$Nil$
$0.25$
$0.5$
$1$
If a normal women marries a colourblind man
Given is : $X$ is the chromosome with gene for haemophilia and $X$ is the chromosome with normal gene. Which of the following individuals will act as carrier for haemophilia
One way of detecting sex linked inheritance is
Among symbol $A, B$ and $C, C$ indicates
What is the cause of haemophilia