Genetic factors play a significant role in the traits associated with alcohol use disorders (AUDs). Several studies have explored the genetic basis of impulsivity, a characteristic linked to AUDs. For instance, variations in the 5-HT2A receptor gene and the dopamine receptor D2 (DRD2) gene have been associated with impulsivity in alcohol-dependent individuals. Additionally, the tryptophan hydroxylase (TPH) gene, which is involved in serotonin biosynthesis, has been implicated in alcoholism and impulsivity. Although the specific relationships between these genes and impulsivity are not fully understood, these findings suggest a connection between serotonin function and alcoholism. Understanding the genetic pathways involved in impulsivity can contribute to our understanding of the neurochemical mechanisms underlying the development of alcohol abuse.