Genetic Heredity Calculator.
Reverse Trait Calculator
This online calculator can estimate traits like eye or hair color of one parent from child's and another parent's and his/her grandparents' phenotypes.
This heredity calculator use simplified models to calculate traits and the certainty is far from 100% due to the fact that
human genetics is far more complex than a simple mendelian dominant/recessive model. Personal Report
and Heredity Report give better results, providing that you had your genome
sequenced by a commercial personal genomics companies like 23andMe, deCODEMe, Ancestry.com or Family Tree DNA.
The pigmentation of the iris in humans varies from light brown to black, depending on the concentration of melanin in the iris pigment epithelium (located on the back of the iris), the iris stroma and the cellular density of the stroma. Eye color is an inherited trait influenced by more than one gene.
This calculation uses a two-genes(brown vs non-brown and blue vs green) co-dominance model.
Hair color is determined by the amount of two pigments - brown-black eumelanin predominates in black and brown hair and red-yellow pheomelanin in red hair. Blond hair contains low levels of both pigments. The genetics of human hair color are not firmly established, but there are indications that multiple genes determine whether a person will have brown, blond or red hair.
This calculation uses a two-genes(brown vs non-brown and red vs non-red) co-dominance model.