Pick the eye colors of mom and dad — and grandparents if you know them — and we'll tell you the most likely eye color for your baby. Plus the actual science behind why.
The classic Punnett-square model from 1907 ('brown is dominant over blue') is wrong. Modern research (Sturm & Larsson 2009; Liu et al. 2010) identifies 16+ genes contributing to human eye color, with HERC2 and OCA2 doing the heavy lifting.
We compute a probability distribution across five color bands rather than a single 'most likely' answer. Adding grandparents bumps reported accuracy from ~70% to ~85% by uncovering recessive alleles that often hide one generation back.
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