Disorders of amino acid metabolism results in
Alkaptonuria
Phenylketonuria
Albinism
All the above
How many linkage groups are present in Drosophilla
$9 : 3 : 3 : 1$ ratio is modified to $9 : 7$ ratio due to
Lyon hypothesis deals with
Sex-linked characters are
Which of the following phenomena leads to variation in $DNA$?