rs1143646
A SNP in the HTT gene on chromosome 4. Its most notable genotype is T;T: common in complete genomics
- Gene
- HTT
- Location
- Chr 43,146,926 (GRCh38)
- Highest magnitude
- 0.0Typical
- Tested on
- 23andMe
- Minor allele frequency
- 2%
Genotypes
As shown in 23andMe and AncestryDNA files.
On SNPedia: (T;T). Magnitude rates how notable a genotype is from 0 to 10, not how risky it is.
Frequency
Share of each genotype in 7 HapMap populations.
- AverageT;T 96%
- European ancestry (Utah)T;T 91%
- Han Chinese (Beijing)T;T 100%
- Japanese (Tokyo)T;T 100%
- Yoruba (Nigeria)T;T 100%
- Gujarati IndianT;T 93%
- Mexican ancestry (Los Angeles)T;T 97%
- TuscanT;T 92%
Source and license
Adapted from rs1143646 on SNPedia, using a snapshot taken October 16, 2026. SNPedia content is shared under CC BY-NC-SA 3.0 US, and this page is shared under the same license.
SNPedia is a community-edited wiki. Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice. Magnitude is a community rating of how interesting a genotype is, not a risk score.