Markers / Gene
ADRB2
One position in this gene is readable from a home DNA test.
The airway receptor that asthma inhalers act on
rs1042713 · chr5:148,206,440 · G/A · evidence: strong
Beta-2 receptors relax the smooth muscle around your airways. They are what a blue reliever inhaler targets. This variant changes how the receptor behaves after repeated stimulation, which is why it has been studied for asthma treatment response.
| If you carry | What it means |
|---|---|
| No copies | You have the arginine version on both copies |
| One copy | You carry one of each |
| Two copies | You have the glycine version on both copies |
| Ancestry group | A (the effect version) | |
|---|---|---|
| African | 52.0% | |
| American | 45.7% | |
| East Asian | 54.9% | |
| European | 38.6% | |
| South Asian | 44.6% |
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.
Where this gene fits
If you have taken a home DNA test, these positions are already in your file.
Read my file