In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree.
Autosomal recessive
$X$-linked dominant
Autosomal dominant
$X$-linked recessive
Given below is a highly simplified representation of the human sex chromosomes from a karyotype.
The genes $a$ and $b$ could be of
Phenylketonuria is a genetic disorder due to a defect in metabolism of the following.
Carrier of genes of colour blindness are present in
Which is not Mendelian disorder in man?
A woman with normal vision, but whose father was colour blind, marries a colour blind man. Suppose that the fourth child of this couple was a boy. Thus boy