{{Rsnum
|rsid=3125
|Gene=HTR2A
|Chromosome=13
|position=46834716
|Orientation=minus
|GMAF=0.1373
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(C;C)
|geno2=(C;G)
|geno3=(G;G)
|Gene_s=HTR2A
}}{{ population diversity
| geno1=(C;C)
| geno2=(C;G)
| geno3=(G;G)
| CEU | 1.8 | 20.7 | 77.5
| HCB | 2.2 | 22.6 | 75.2
| JPT | 5.4 | 36.6 | 58.0
| YRI | 0.0 | 12.9 | 87.1
| ASW | 1.8 | 14.3 | 83.9
| CHB | 2.2 | 22.6 | 75.2
| CHD | 1.9 | 32.4 | 65.7
| GIH | 2.0 | 26.3 | 71.7
| LWK | 0.9 | 15.5 | 83.6
| MEX | 3.4 | 36.2 | 60.3
| MKK | 2.0 | 20.3 | 77.8
| TSI | 2.0 | 31.4 | 66.7
| HapMapRevision=28
}}{{PMID Auto
|PMID=19584773
|Title=Association between the serotonin 2A receptor gene and bipolar affective disorder in an Australian cohort
}}
: "Haplotype association analysis suggests that the haplotype CCGCA (at SNPs [[rs3125]], [[rs6314]], [[rs1923886]], [[rs2224721]] and [[rs2770296]]) is protective against [[bipolar disorder]] (P = 0.021, odds ratio 0.63) and the rarer haplotype CCACG confers risk to the disorder (P = 0.0065, odds ratio 3.08)."

Genetic variation in the serotonin 2A receptor and suicidal ideation in a sample of 270 Irish high-density [[schizophrenia]] families.{{PMID|18712714|OA=1
}}

{{PMID Auto
|PMID=18618671
|Title=Genetic predictors of depressive symptoms in cardiac patients.
|OA=1
}}

{{PMID Auto
|PMID=21172166
|Title=Pharmacogenetics of antidepressant response.
|OA=1
}}

{{on chip | 23andMe v1}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | Affy GenomeWide 6}}
{{on chip | FTDNA2}}
{{on chip | FTDNA}}
{{on chip | HumanOmni1Quad}}