The number of phenotypes in $ABO$ blood group is
A man of blood group-$A$, marries a woman of blood group-$B$, both of them are heterozygous for blood group, chances of their first child having blood group $AB$ will be
$ABO$ blood groups in humans are controlled by the gene $I$. It has three alleles $ I^A, I^B$ and $i$. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?
If two persons with $‘AB’$ blood group marry and have sufficiently large number of children, these children could be classified as $‘A’$ blood group: $‘AB’$ blood group : $‘B’$ blood group in $1 : 2 : 1$ ratio. Modern technique of protein electrophoresis reveals presence of both $‘A’$ and $‘B’$ type proteins in $‘AB’$ blood group individuals.This in an example of
In the $ABO$ system, of blood group which of the following is example of co-dominance ?