rs1799966(C;T)

Very slightly increased breast cancer risk

Magnitude
1.1Minor
Repute
Bad
Frequency
43%Average of 11 populations
On SNPedia
rs1799966(A;G)Minus strand
Gene
BRCA1

Frequency

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

  • Chinese (Denver)55%
  • Tuscan52%
  • Gujarati Indian50%
  • European ancestry (Utah)46%
  • African ancestry (Southwest US)46%
  • Mexican ancestry (Los Angeles)43%
  • Han Chinese (Beijing)42%
  • Japanese (Tokyo)39%
  • Maasai (Kenya)36%
  • Yoruba (Nigeria)35%
  • Luhya (Kenya)33%

Other genotypes of rs1799966

  1. T;TGoodcommon in clinvarTypical · 0.048% of people
  2. C;CMost notableBadvery slightly increased risk for breast cancerWorth knowing · 2.09% of people

All about rs1799966

Source and license

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 Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice.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