In which of the following phenomena can both | vedclass

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(A) In human $ABO$ blood grouping,the gene $I$ has three alleles: $I^A$,$I^B$,and $i$.$I^A$ and $I^B$ are dominant over $i$,which shows the phenomenon

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Blood grouping

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(A) In human $ABO$ blood grouping,the gene $I$ has three alleles: $I^A$,$I^B$,and $i$.$I^A$ and $I^B$ are dominant over $i$,which shows the phenomenon of dominance.When $I^A$ and $I^B$ are present together,both express themselves equally,which is the phenomenon of codominance.Therefore,human blood grouping is the correct example where both dominance and codominance are observed.

In which of the following phenomena can both dominance and codominance be observed?

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