Categories
Genetics & Science
Heritage, inheritance, and the science behind predictions.
Genetics & ScienceSep 5, 2026
How Baby Eye Color Is Inherited: OCA2, HERC2 and Why Two Brown-Eyed Parents Can Have a Blue-Eyed Baby
The one-gene eye colour chart from school biology is wrong. Two genes on chromosome 15 do most of the work, dozens more fine-tune it, and that is exactly why two brown-eyed parents can have a blue-eyed baby.
ProbaBaby Team9 min
Genetics & ScienceSep 5, 2026
How ProbaBaby Calculates Prediction Confidence (and Why It Caps at 95%)
The confidence number on a ProbaBaby result is not copywriting. It starts at 60%, adds points for grandparents, childhood hair colour, ancestry and photos, and is clamped at 95% because genetics does not do certainty.
ProbaBaby Team8 min