Not all alleles are dominant and recessive like the ones Mendel studied in his pea plants. Some alleles are equally strong and neither are masked by the other. When both alleles are present, they are both expressed in the phenotype. The hybrid is a blend of both alleles. Alleles which are equally strong are said to be "incomplete dominant" alleles. An example of this is found in carnations. When purebred white carnations are crossed with purebred red carnations, the result is a pink carnation. Incomplete dominant alleles are represented by different capitalized letters.

Codominance, is a situation in which both alleles are equally stong and both alleles are visible in the hybrid genotype. An example of codominance is found in chickens. When white chickens are crossed with black chickens, the result is not a grey chicken, but a chicken with both black and white feathers. When expressing incomplete alleles, both alleles are
written as superscipt capital letters placed above the letter "i".

Based on what you've learned, how would you express the genotype of the following incomplete dominant genes?