When both alleles of a pair express themselves fully in the heterozygous condition,it is called.....

In heterozygous condition,the individual expression of both the alleles in the phenotype is exemplified by

$A$ gene showing codominance has

In shorthorn cattle,genes for red $(R_1)$ and white $(R_2)$ coat colour occur. Crosses between red $(R_1R_1)$ and white $(R_2R_2)$ produced $(R_1R_2)$ roan. This is an example of

Codominance is shown by the gene controlling:

In the context of the $ABO$ blood group system,what happens when both alleles $I^A$ and $I^B$ are present together?