The most striking example of point mutation is found in a disease called

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

If mother is a carrier for colour blindness and father is normal, then in the offsprings this disease may be seen in

One way of detecting sex linked inheritance is

A sex linked recessive gene $C$ produces red green colour blindness in humans. A normal woman whose father was colourblind marries a colourblind man. Of all the girls born to these parents what percentage is expected to be colourblind

Pick out the correct statements.

$I.$ Haemophilia is a sex-linked recessive disease

$II.$ Down's syndrome is due to aneuploidy

$III.$ Phenylketonuria is an autosomal dominant gene disorder

$IV.$ Phenylketonuria is an autosomal recessive gene disorder

$V.$ Sickle cell anaemia is an $X$-linked recessive gene disorder