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
Autosomes
$X$ chromosome
$Y$ chromosome
None of the above
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 ?
Select the correct match.
A boy is colour blind, in his two sisters one is colour blind and one is carrier $(normal)$. Then who is colour blind in his family
Gene for colourblindness is located on
Which of the following is not $X$-linked recessive