The visible traits, which is why they are the ones people look up first.
Why this topic Sunscreen and hair loss are where genetics is visible in a mirror.
Counted in Europe PMC, where the title or abstract names both this topic and that rsID. The number is papers, not evidence of a cause.
SLC45A2
Skin pigmentation
15 papers →IRF4
Freckling & sun sensitivity
13 papers →HERC2 / OCA2
Eye color
12 papers →AR
Male pattern baldness tendency
5 papers →PITX2
Atrial fibrillation/atrial flutter
1 paper →TYR
Eye color
1 paper →TCHH
Common traits (Other)
1 paper →MTHFR
Folate metabolism (MTHFR A1298C)
1 paper →MTHFR
Folate metabolism (MTHFR C677T)
1 paper →OR2M7
Asparagus urine odour detection
1 paper →Europe PMC, title and abstract only, searched for “skin pigmentation”, “male pattern baldness”, “androgenetic alopecia”, “sun sensitivity”, “freckling” alongside each published rsID. Full text was not counted: it returns every paper with an rsID buried in a supplementary table. Recounted monthly.