Question

why is human ABO blood group considered as a good example of multiple alleles​

Answer 1

ABO blood grouping is an example for co-dominance

because, when iA and iA genotype expressed it is A blood group

when iB and iB genotype expressed it is B blood group

but when the iA and iB genotype expressed at same time for a single offspring it forms

=>. AB blood group not A or B since the iA express A and iB express B

so both expressed at same hence it is multiple allelism.

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