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
$25\%$
$50\%$
$75\%$
$0\%$
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