rs1535

A SNP in the FADS2 gene on chromosome 11. Its most notable genotype is A;A.

Gene
FADS2
Location
Chr 1161,830,500 (GRCh38)
Highest magnitude
0.0Typical
Tested on
23andMe, AncestryDNA
Minor allele frequency
35%

Genotypes

As shown in 23andMe and AncestryDNA files.

  1. A;AMost notableNot ratedNo summary available.Typical · 0.056% of people
  2. A;GGood4+ IQ points for breastfeedingTypical · 0.032% of people
  3. G;GNot ratednormalTypical · 0.011% of people

On SNPedia: (A;A), (A;G), (G;G). Magnitude rates how notable a genotype is from 0 to 10, not how risky it is.

Frequency

Share of each genotype in 11 HapMap populations.

  • AverageA;A 56% A;G 32% G;G 11%
  • European ancestry (Utah)A;A 44% A;G 43% G;G 12%
  • Han Chinese (Beijing)A;A 40% A;G 45% G;G 15%
  • Japanese (Tokyo)A;A 46% A;G 43% G;G 11%
  • Yoruba (Nigeria)A;A 78% A;G 21% G;G <1%
  • African ancestry (Southwest US)A;A 77% A;G 21% G;G 2%
  • Chinese (Denver)A;A 29% A;G 44% G;G 28%
  • Gujarati IndianA;A 82% A;G 18% G;G 0%
  • Luhya (Kenya)A;A 85% A;G 15% G;G <1%
  • Mexican ancestry (Los Angeles)A;A 14% A;G 41% G;G 45%
  • Maasai (Kenya)A;A 69% A;G 30% G;G 2%
  • TuscanA;A 57% A;G 34% G;G 9%

Other FADS2 SNPs

All FADS2 SNPs

Notes

From SNPedia

Notes

==Publications== ===Breast feeding and IQ=== ===Other publications===

Source and license

Adapted from rs1535 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 Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice.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.