In the ABO blood type system, the IA allele is _____ with the IB allele.Multiple Choicedominantcodominantrecessivehomologousheterologous

In the ABO blood type system, the interaction between the IA and IB alleles involves a specific type of genetic relationship.

Final Answer

The IA allele is codominant with the IB allele.

Explanation

In genetics, codominance occurs when both alleles in a heterozygous organism contribute equally and visibly to the organism's phenotype. In the case of the ABO blood type system, individuals with genotype IAIB will express both the A and B antigens on the surface of their red blood cells, resulting in blood type AB. This means that neither IA nor IB is dominant over the other; rather, they both manifest simultaneously. In contrast, a dominant allele would mask the expression of a recessive allele, which is not the case here. Thus, when both alleles are present, the individual exhibits characteristics of both alleles, confirming codominance.