Baby Eye Color Predictor

You pick each parent's eye color (brown, green, or blue), and the calculator looks up the probability of a brown, green, or blue eyed baby in a standard inheritance table. The table comes from the simplified two-gene model, where the bey2 gene controls brown versus blue and the gey gene controls green versus blue. The result is the same no matter which parent you label first, because the table is symmetric.

It is a simplified teaching model that explains eye color with two genes instead of the full picture. The bey2 gene carries a brown allele that dominates a blue allele, and the gey gene carries a green allele that dominates blue. Brown shows up if any brown allele is present, green shows up when there is no brown but at least one green, and blue appears only when all four alleles are blue. Brown beats green, and green beats blue.

Yes. In the two-gene table, brown-eyed parents have about a 75 percent chance of a brown-eyed child, roughly 18.75 percent green, and about 6.25 percent blue. That happens when both parents carry a hidden blue allele and pass it on. A blue-eyed child from two brown-eyed parents is uncommon but entirely possible.

In this simplified model, no. Two blue-eyed parents give a 100 percent chance of a blue-eyed child, because neither parent carries a brown or green allele to pass on. In real life rare exceptions exist, since eye color involves many genes beyond the two in this table, but they fall outside this estimate.

Treat it as a rough estimate, not a forecast. Real eye color is polygenic and influenced by at least 16 genes, and this model ignores hazel and amber eyes entirely. The percentages reflect the classic two-gene table that is widely taught, so actual outcomes can and do differ from the numbers shown.

No. This tool is for education and curiosity only and is not a substitute for professional medical or genetic advice. It does not analyze any DNA and cannot diagnose or rule out inherited conditions. For real questions about heredity, talk to a qualified healthcare professional or genetic counselor.