:Match the columns :

Column $I$	Column $II$
$(1)$ Albinism	$(p)$  recessive gene represented by HbsHbs.
$(2)$ Phenyl  Ketonuria	$(q)$ recessive gene represented by cc.
$(3)$ Sickle cell  anaemia	$(r)$ recessive gene  represented by aa.
$4)$ Alkaptonuria	$(s)$ recessive gene represented by pp

Assertion : Haemophilia is a recessive sex linked disease.

Reason : Haemophilia occurs due to mutation of a structural gene on chromosome $15$.

If a colour­blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour­blind is

A woman with two genes for haemophillia and one gene for colourblindness on one of the $X$ chromosomes marries a normal man. How will the progeny be

Describe Mendelian Disorder
 

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