In the ABO blood grouping system,which of the | vedclass

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(C) In the $ABO$ blood grouping system,the gene $I$ has three alleles: $I^A$,$I^B$,and $i$.Alleles $I^A$ and $I^B$ are dominant over $i$,but when both

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$I^AI^B$

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(C) In the $ABO$ blood grouping system,the gene $I$ has three alleles: $I^A$,$I^B$,and $i$.Alleles $I^A$ and $I^B$ are dominant over $i$,but when both $I^A$ and $I^B$ are present together,they both express themselves equally.This phenomenon,where both alleles of a gene pair express themselves simultaneously in a heterozygote,is known as co-dominance.Therefore,the genotype $I^AI^B$ results in blood group $AB$,which is a classic example of co-dominance.

In the $ABO$ blood grouping system,which of the following is an example of co-dominance?

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