{{Rsnum
|rsid=643627
|Gene=HTR2A
|Chromosome=13
|position=46854476
|Orientation=minus
|GMAF=0.326
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(A;A)
|geno2=(A;G)
|geno3=(G;G)
|Gene_s=HTR2A,HTR2A-AS1
}}{{ population diversity
| geno1=(A;A)
| geno2=(A;G)
| geno3=(G;G)
| CEU | 51.6 | 42.2 | 6.2
| HCB | 28.9 | 46.7 | 24.4
| JPT | 26.7 | 51.1 | 22.2
| YRI | 81.0 | 17.5 | 1.6
| ASW | 0.0 | 0.0 | 0.0
| CHB | 28.9 | 46.7 | 24.4
| CHD | 0.0 | 0.0 | 0.0
| GIH | 0.0 | 0.0 | 0.0
| LWK | 0.0 | 0.0 | 0.0
| MEX | 0.0 | 0.0 | 0.0
| MKK | 0.0 | 0.0 | 0.0
| TSI | 0.0 | 0.0 | 0.0
| HapMapRevision=28
}}{{PMID|16814396}} Three ([[rs643627]]-[[rs594242]]-[[rs6311]]: A-C-T), two ([[rs594242]]-[[rs6311]]: C-T) and a single functional ([[rs6311]]: T) marker were protective against suicidal behavior. 
The complementary makers ([[rs594242]]-[[rs6311]]: G-C and [[rs6311]]: C) were associated with increased risk for non-violent and impulsive suicidal behavior. 
Furthermore, CC-homozygotes for the functional SNP [[rs6311]] reported more anger-  and aggression-related behavior.

{{PMID Auto
|PMID=20827275
|Title=Influence of HTR2A polymorphisms and parental rearing on personality traits in healthy Japanese subjects
}}

Genetic evaluation of the serotonergic system in chronic fatigue syndrome.{{PMID|18079067}} Found that this is in linkage disequilibrium with [[rs655888]].

{{PMID Auto
|PMID=17590256
|Title=5-HT2A SNPs and the Temperament and Character Inventory.
}}

{{on chip | 23andMe v1}}
{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | HumanOmni1Quad}}