A husband and wife have normal vision but fathers of both of them were colour blind. Probability of their first daughter to be colour blind is

What are all the chances of colour blind daughter and sons being born in a marriage of normal man marrying a normal woman, whose father was colour blind

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

How Genetic disorders arises ? Explain by giving suitable examples.
 

Select the incorrect statement with regard to haemophilia.

If a colour blind woman marries a normal visioned man, their sons will be