Markers / Gene
MTRR
One position in this gene is readable from a home DNA test.
The other folate gene, MTRR
rs1801394 · chr5:7,870,973 · A/G · evidence: moderate
MTRR keeps the enzyme that recycles homocysteine back into methionine running, using vitamin B12. It is usually reported next to MTHFR, and it attracts some of the same overreach.
| If you carry | What it means |
|---|---|
| No copies | You have the common version on both copies |
| One copy | You carry one variant copy |
| Two copies | You carry two variant copies |
| Ancestry group | G (the effect version) | |
|---|---|---|
| African | 24.6% | |
| American | 28.1% | |
| East Asian | 26.3% | |
| European | 52.3% | |
| South Asian | 52.5% |
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