What a test can show
Genotyping selected variants gives a probabilistic, not absolute, prediction.
Common traits
HERC2Eye colour
Regulatory variants near OCA2 explain a substantial share of eye-colour variation in studied populations.
RELATIONSHIP VALIDITYReplicated trait association
ACTIONABILITYNo medical actionability
SOURCE CHECKLinks and claim boundaries are editorially checked; external expert review is stated only with named disclosure
Practical meaning
A useful example of a strong but non-deterministic common-trait association.
Where knowledge ends
Accuracy depends on ancestry and model; one SNP does not describe a person’s appearance.
SOURCES AND VERSION
Verifiable, not ‘trust us’.
Updated: 14 August 2026. Any clinical interpretation requires the exact variant, testing method, family information and medical context.