Haemophilia is example of
Infectious disease
Sex linked recessive trait
Autosomal linked recessive
None of the above
A girl of normal vision whose father was colourblind marries a man of normal vision whose father was also colourblind. Their sons would be (of total number of $sons$)
Person whose father is colourblind marries a lady whose mother is daughter of a colourblind man. Their children will be
Phenyketonuria is a genetic disorder of
$A$ : Sickel cell anaemia occurs due to the point mutation.
$R$ : $mRNA$ produced from $Hb(s)$ gene has $GAG$ instead of $GUG$.