Markers / Gene
near ZEB2
One position in this gene is readable from a home DNA test.
Sneezing at bright light
rs10427255 · chr2:146,125,523 · T/C · evidence: moderate
Between a sixth and a third of people sneeze when they walk into sunshine. It runs in families, and this is the position most reliably associated with it.
| If you carry | What it means |
|---|---|
| No copies | Less likely to photic sneeze |
| One copy | More likely to photic sneeze |
| Two copies | Most likely to photic sneeze |
| Ancestry group | C (the effect version) | |
|---|---|---|
| African | 41.3% | |
| American | 37.3% | |
| East Asian | 44.1% | |
| European | 49.5% | |
| South Asian | 44.9% |
1000 Genomes Project phase 3, via Ensembl, retrieved 2026-09-23. These groupings are coarse and flatten a great deal of internal diversity, particularly within Africa. A variant being common somewhere tells you where a piece of your ancestry probably comes from, and nothing else.
If you have taken a home DNA test, these positions are already in your file.
Read my file