If a human mother has ‘$O$' blood group, the foetus would die if the blood of foetus is
$A$
$B$
$AB$
Would remain unaffected by blood group whether it is $A, B$ or $AB$
$ABO$ 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?
A gene showing codominance has
Progeny with blood group $‘O’$ can not be obtained in cross
$ABO$ blood grouping is controlled by gene I which has three alleles and show codominance. There are six genotypes. How many phenotypes in all are possible?
The number of phenotypes in $ABO$ blood group is