rs1799966(C;C)

Very slightly increased risk for breast cancer

Magnitude
2.0Worth knowing
Repute
Bad
Frequency
9%Average of 11 populations
On SNPedia
rs1799966(G;G)Minus strand
Gene
BRCA1

Frequency

Share of people with C;C in each HapMap population.

  • Gujarati Indian18%
  • Chinese (Denver)16%
  • Mexican ancestry (Los Angeles)16%
  • Han Chinese (Beijing)12%
  • European ancestry (Utah)8%
  • Japanese (Tokyo)8%
  • Tuscan7%
  • Luhya (Kenya)5%
  • African ancestry (Southwest US)4%
  • Maasai (Kenya)3%
  • Yoruba (Nigeria)1%

Other genotypes of rs1799966

  1. T;TGoodcommon in clinvarTypical · 0.048% of people
  2. C;TBadvery slightly increased breast cancer riskMinor · 1.143% of people

All about rs1799966

Source and license

Adapted from rs1799966(G;G) 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 Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice.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.