The allele for eye color is Z, with each individual color corresponding to a two/three letter code. The order of the eye color alleles are as follows:
Inheritance is multi-variable and offspring eye color is exhibited according to the spectrum. For example:
- If the offspring receives a Zbla allele and a Zpi allele, the offspring can exhibit any eye color on the spectrum.
- If the offspring receives a Zbla allele and a Zor allele, the offspring could have black, gray, brown, hazel, or orange eyes.
- If the offspring receives a Ztu allele and a Zpi allele, the offspring could have turquoise, cyan, blue, indigo, purple, or pink eyes.