What are alleles I a and I b

The alleles I a and I b are the alleles that works for identifying unique antigen.

Explanation:

These alleles are generally found as deposition on the surface of the red blood cells. Again, these antigens are different form made from one protein. The Ia and I b alleles are found to be co-dominant and allele i is recessive. In human beings three different alleles are there, Ia, I b and I. The alleles are nothing, but a form of gene. Many genes are there having different function but are present in the same position. Humans are diploid, hence have two allele, each from one parent it has been inherited.