(a–b) Quantitative analysis of DCX-labeled cells of immature (a) and mature (b) morphology in the DG from the second group of mice (water only: WT, n = 4; Het, n = 4; KO, n = 4; 2BC: WT, n = 6; Het, n = 9; KO, n = 5). Post hoc analysis revealed significant differences between water- and ethanol-drinking mice of a given genotype (**, p < 0.01).