{{Rsnum
|rsid=2770296
|Gene=HTR2A
|Chromosome=13
|position=46866425
|Orientation=plus
|GMAF=0.2342
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
|Gene_s=HTR2A
}}{{ population diversity
| geno1=(C;C)
| geno2=(C;T)
| geno3=(T;T)
| CEU | 5.3 | 38.1 | 56.6
| HCB | 9.5 | 26.3 | 64.2
| JPT | 13.3 | 35.4 | 51.3
| YRI | 1.4 | 21.8 | 76.9
| ASW | 1.8 | 15.8 | 82.5
| CHB | 9.5 | 26.3 | 64.2
| CHD | 5.5 | 39.4 | 55.0
| GIH | 9.9 | 47.5 | 42.6
| LWK | 1.8 | 21.8 | 76.4
| MEX | 5.2 | 39.7 | 55.2
| MKK | 0.6 | 30.1 | 69.2
| TSI | 5.9 | 41.2 | 52.9
| 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)."

{{PMID Auto
|PMID=19566713
|Title=Investigation of 17 candidate genes for personality traits confirms effects of the HTR2A gene on novelty seeking
}}

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

{{PMID Auto
|PMID=19184136
|Title=Examination of association of genes in the serotonin system to autism.
|OA=1
}}

{{PMID Auto
|PMID=22947179
|Title=Analysis of 34 candidate genes in bupropion and placebo remission
}}

{{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}}