One of the genes present exclusively on the $X$-chromosome in humans is concerned with

Choose the correct option for the symptoms of $Phenylketonuria$ $(PKU)$.

Given below is a pedigree showing the inheritance of Myotonic Dystrophy,an autosomal dominant disorder. The genotypes of person $1, 2$ and $3$ in this family tree are:

Given below are two statements:
Statement $I$: Sickle cell anaemia and Haemophilia are autosomal dominant traits.
Statement $II$: Sickle cell anaemia and Haemophilia are disorders of the blood.
In the light of the above statements,choose the correct answer from the options given below:

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

Which of the following is not a genetic disorder?