Figure 2

Pair wise shape differences between four categories in grey and red shading, region of overlap in brown. A) young versus old: Adult C57BL/6J mice 8-14 weeks old (gray shape) vs. 16-23 weeks old (red shape) (exaggerated x12); B) adult C57BL/6J mice with smaller (gray shape) vs. larger (red shape) mandibles (exaggerated x11); C) wild-caught Dom Iran Ahvaz (gray shape) vs. first generation offspring raised in captivity (red shape) (exaggerated x15); D) mice fed soft diet (gray shape) vs. hard diet (red shape) (exaggerated x3). Shape changes were calculated using discriminant function analysis between the respective groups.