Multiple+alleles

The most common example of multiple alleles is blood type. There are more than two alleles. For blood type, there are three alleles, IA, IB, and i. They combine to form 6 possible genotypes - IAIB, IAi, IAIA, IBIB, IBi, and ii. IAIB results in blood type AB, IAIA and IAi results in blood type A, IBi and IBIB results in blood type B, and ii results in blood type O.