Which of the following is controlled by a recessive gene in humans?

Which of the following is not true of haemophilia?

$A$ normal woman,whose father was colour-blind,is married to a normal man. The sons would be

$A$ man and a woman,who do not show any apparent signs of a certain inherited disease,have seven children ($2$ daughters and $5$ sons). Three of the sons suffer from the given disease but none of the daughters are affected. Which of the following modes of inheritance do you suggest for this disease?

$A$ color-blind man marries a woman whose father was color-blind. What is the probability of color blindness in their children?

Genes of colour blindness are carried in