If two persons with 'AB' blood group marry and have the sufficiently large number of children, these children

Question

If two persons with 'AB' blood group marry and have the sufficiently large number of children, these children could be classified as 'A' blood group: 'AB' blood group: 'B' blood group in 1: 2: 1 ratio. The modern technique of protein electrophoresis reveals the presence of both 'A' and 'B' type proteins in 'AB' blood group individuals. This is an example of:

Accepted Answer

, ABO blood groups are controlled by the gene *I*. When both alleles  and  are present together (as in an AB individual), they both express their own types of sugars (antigens). This phenomenon, where the F1 generation resembles both parents by expressing traits from both alleles simultaneously, is called co-dominance .

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