A child of a mother with blood group $A$ and a father with blood group $AB$ may have any one of the following blood groups except
$A$
$B$
$AB$
$O$
A person meets with an accident and great loss of blood has occurred. There is no time to analyse his blood group. It is safe to transfer blood of group
If one parent has blood group $A$ and the other parent has blood group $B$, the offsprings have which blood group
In the $ABO$ system, of blood group which of the following is example of co-dominance ?
A child of $O$ - blood group has $B$ -blood grouped father. The genotype of father will be
In shorthorn cattle genes for red $(r_1)$, and white $(r_2)$ coat colour occur. Crosses between red $(r_1r_2)$ and white $(r_2r_2)$ produced $(r_1r_2)$ roan. This is an example of