A man with blood group $‘A’$ marries a woman with blood group $‘B’$. What are all the possible blood groups of their offsprings?

  • [NEET 2015]
  • A

    $A, B, AB$ and $O$

  • B

    $O$ only

  • C

    $A$ and $B$ only

  • D

    $A, B$ and $AB$ only

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$ABO$ 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?

  • [AIPMT 2010]

A person with blood group $‘A'$ can be given blood of which group

In case of disputed parentage, the blood group analysis of the mother, child and alleged father can

  • [AIIMS 1984]

In short horned cattle, genes for red $(R)$ and white $( r )$ coat colour occur. Cross between red $(RR)$ and white $(rr)$ produced $(Rr)$ roan. This is an example of

$A$ : 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