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Codominance Codominance is a type of non-Mendelian inheritance occurs when the heterogenous genotype leads to a phenotype that involves both phenotypes resulting from the homozygous genotype. For instance, fur color in cattle is a case of codominance. A homozygous cow will have either all red or all white fur. On the other hand, a heterozygous cow will have splotches of red fur and splotches of white fur.
Incomplete Dominance Incomplete dominance is similar to codominance in that the phenotype of the heterozygous individual is distinct from that of a homozygous individual. However, instead of both homozygous traits being distinguishably present in the heterozygous individual, the traits are mixed. For example, some flower species exhibit incomplete dominance in petal color. The dominant trait may be red and the recessive white. A heterozygous plant, on the other hand, will have a blended or mixed phenotype--a pink flower rather than red or white.