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  4. A man with blood group A marries a woman having blood group B. The maximum possible blood groups among their progenies are

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Q. A man with blood group $A$ marries a woman having blood group $B$. The maximum possible blood groups among their progenies are

KCETKCET 2020

Solution:

A woman with blood group $A$ can have either of the genotypes $-I^{A} I^O$ or $I^{A} I^{A} . A$ man with a blood group $B$ can have either of the genotypes -$I^BI^O$ or $I^BI^B$. Since the given question doesn't mention the specific genotype, thus any of the above-mentioned genotypes can be crossed. As a result of which there is a maximum possibility of obtaining all the blood groups ($A, B, A B, O$ ) among their progeny.