{{Rsnum
|rsid=326946
|Gene=ARHGAP20
|Chromosome=11
|position=110628530
|Orientation=minus
|GMAF=0.2778
|Gene_s=ARHGAP20
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(G;G)
|geno2=(G;T)
|geno3=(T;T)
}}{{ population diversity
| geno1=(G;G)
| geno2=(G;T)
| geno3=(T;T)
| CEU | 3.5 | 25.7 | 70.8
| HCB | 2.2 | 26.9 | 70.9
| JPT | 2.7 | 30.4 | 67.0
| YRI | 43.8 | 46.6 | 9.6
| ASW | 31.6 | 47.4 | 21.1
| CHB | 2.2 | 26.9 | 70.9
| CHD | 2.8 | 22.9 | 74.3
| GIH | 2.0 | 18.8 | 79.2
| LWK | 44.9 | 43.9 | 11.2
| MEX | 0.0 | 17.5 | 82.5
| MKK | 38.7 | 41.3 | 20.0
| TSI | 5.9 | 19.6 | 74.5
| HapMapRevision=28
}}{{PMID Auto GWAS
  |PMID=23535033
  |Trait=Alzheimer's disease (cognitive decline)
  |Title=Genome-wide association study of the rate of cognitive decline in Alzheimer's disease.
  |RiskAllele=
  |Pval=7E-7
  |OR=.16
  |ORtxt=unit decrease
  }}

{{PMID Auto
|PMID=15660291
|Title=Population structure, admixture, and aging-related phenotypes in African American adults: the Cardiovascular Health Study.
|OA=1
}}

{{on chip | 23andMe v1}}
{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | FTDNA2}}
{{on chip | HumanOmni1Quad}}
{{on chip | Illumina Human 1M}}