$ABO$ 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?
Six
Three
Four
Five
What percentage of homozygous $R h^{-i i}$ will be born amongst four children of a couple where the husband is heterozygous for $R h^{+i i}$ and wife is homozygous for $R h^{-i i}$ gene?
A child with mother of $O$ blood group and father of $A$ blood group, will have the following blood group.
$A$ : Blood group phenotype is controlled by presence or absence of antigens present on surface coating of $RBC$.
$R$ : These antigens are of three types and found in the oligosaccharides rich head regions of a glycophorin
For a child having blood group $B$, if father has blood group $A$, what may be the blood group of the mother
When dominant and recessive alleles express themselves together, it is called