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4.Principles of Inheritance and Variation
medium
Parents of blood groups $O$ and $AB$ cannot have a child of group $AB$ because
A
Gene $O$ is dominant over gene $A$
B
Gene $O$ is dominant over gene $B$
C
Gene $A$ or $B$ is absent in one of the parents
D
Gene $A$ and $B$ are absent in one of the parents
Solution
(d)Hetrozygous $I^A/I^B$ individual are blood group $AB$. Both the A antigen (Product of the $I^A$ alleles) and the $B$ antigen (Product of the $I^B$ alleles) are produced by them.
Standard 12
Biology
