“…For example, neuroticism is associated with the short allele of the DRD4 exon III polymorphism (Tochigi et al, 2006); the number of CAG repeats at the androgen receptor (AR) gene in men (Westberg et al, 2009); the serotonin transporter promoter 5-HTTLPR short allele (Sen, Burmeister, & Ghosh, 2004); and the GABA(A) Alpha 6 receptor Pro385Ser Pro allele (Sen et al, 2004). Extraversion is also associated with the number of CAG repeats at the AR locus (Lukaszewski & Roney, 2011;Westberg et al, 2009).…”