$ABO$ blood groups are controlled by the gene
$ABO$
$O$
$I$
$i$
Mother and father both have blood group $‘A’$. They have two children one with blood group $‘O’$ and second one with blood group $‘A’$. They have
$A$ child with mother of $B$ blood group and father of $AB$ group blood group, will not have the following blood group.
A child's blood group is ‘$O$'. The parents blood groups cannot be
Blood group $‘B'$ will have alleles
A man with blood group $‘A’$ marries a woman with blood group $‘B’$. What are all the possible blood groups of their offsprings?