Describe Mendelian Disorder
Colour blindness results from
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 ?
A colourblind man has a colourblind sister but a normal brother than phenotype of its parents is
Genes for colour blindness is carried by
$I.$ Abnormal development
$II.$ Father
$III.$ Mother
$IV.$ Autosomes