Table 2 presents genotype and allele frequencies for both the 5-HT2a receptor T102C genotype and the 5-HTTLPR genotype. Tests for Hardy-Weinberg Equilibrium revealed that the 5-HT2a receptor genotype conformed to Hardy-Weinberg Equilibrium in our sample (χ2 (1) =1.08, p = .30), while the 5-HTTLPR genotype did not (χ2 (1) = 5.52, p = .02). Nonetheless, the effect size for comparisons of observed and expected 5-HTTLPR genotype frequencies was very small (φ = .13), suggesting that deviations from Hardy-Weinberg Equilibrium were modest at best.
