The blood of $AB$ group donor can be transfused to a person with the blood group
$A$
$B$
$AB$
$O$
Parents of blood groups $O$ and $AB$ cannot have a child of group $AB$ because
The number of phenotypes in $ABO$ blood group is
A person with blood group $‘A'$ can be given blood of which group
A man with blood group $‘A’$ marries a woman with blood group $‘B’$. What are all the possible blood groups of their offsprings?
Write short note on co-dominance.