One of the following is not true to haemophilia
Royal disease
Bleeder’s disease
$X$-linked disease
$Y$-linked disease
Given below is pedigree chart showing the inheritance of a certain trait in human. Select the correct option for the given chart
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
Select the correct match.
Which of the following is not true of haemophilia?
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