{{Rsnum
|rsid=10784502
|Gene=HMGA2
|Chromosome=12
|position=65950030
|Orientation=plus
|GMAF=0.3567
|Gene_s=HMGA2
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
}}{{ population diversity
| geno1=(C;C)
| geno2=(C;T)
| geno3=(T;T)
| CEU | 26.5 | 41.6 | 31.9
| HCB | 0.0 | 21.2 | 78.8
| JPT | 0.9 | 23.0 | 76.1
| YRI | 34.7 | 49.7 | 15.6
| ASW | 29.8 | 49.1 | 21.1
| CHB | 0.0 | 21.2 | 78.8
| CHD | 2.8 | 20.2 | 77.1
| GIH | 7.9 | 34.7 | 57.4
| LWK | 18.2 | 47.3 | 34.5
| MEX | 6.9 | 37.9 | 55.2
| MKK | 14.7 | 50.0 | 35.3
| TSI | 19.6 | 48.0 | 32.4
| HapMapRevision=28
}}{{PMID|22504417|OA=1
}} associated with intracranial volume (12q14.3; N = 15,782; P = 1.12 × 10−12)

http://www.genomesunzipped.org/2012/04/another-iq-gene-new-methods-old-flaws.php

(C;C) has higher cranial capacity (about 2 teaspoons) and over 2% higher IQ.

(C;T) is half this positive effect.

{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | Affy GenomeWide 6}}
{{on chip | FTDNA2}}
{{on chip | HumanOmni1Quad}}
{{on chip | Illumina Human 1M}}