Log-transformed corticosterone levels in mice from Phase 1. Mice in Phase 1 had blood collected 2 h following swim stress to measure serum corticosterone levels. Female (A-B) wildtypes are represented by teal squares, and female heterozygotes are represented by blue diamonds. Male (C-D) wildtypes are represented by orange squares, and male heterozygotes are represented by yellow diamonds. Phase 1 cued data (A,C) and Phase 1 context data (B,D) are graphed in columns separated by sex. Data are log-transformed serum corticosterone levels, showing individual data points. Horizontal lines are shown as the mean, with vertical lines as ± 95% confidence interval. ***p=0.001 (panel D) indicates difference between heterozygous and wildtype within same sex and same swim condition. ✣✣✣p<0.001 (panel D) indicates difference between no swim and swim conditions within same sex and genotype. ⊙⊙p=0.008, ⊙p=0.014 (left to right, panel C); ⊙⊙⊙p<0.001, ⊙⊙⊙p<0.001, ⊙⊙⊙p<0.001 (left to right, panel D) indicates difference between sexes within same genotype and swim condition.