n: “On a genetic background (at and AW) which causes the belly hair to be lighter than the back hair, the belly hair comes up farther round the sides of the body and face” (Curry 1959).
An abnormal dorsoventral pigment pattern is readily apparent in at/at; deH/deH mice, but comparison to nonmutant animals is more accurately described in terms of ventral, lateral, and dorsal regions (Figures 1G and 2A). The ventral region has short hairs with a gray base and cream-colored tip whose boundary coincides with the limb–body wall junction; both the appearance of this region and position of the boundary are approximately similar in at/at compared to at/at; deH/deH mice. The lateral region contains yellow hairs of progressively increasing length; in at/at mice, the lateral region appears as a thin yellow stripe along the flank, but in at/at; deH/deH mice, the lateral region is considerably expanded with a diffuse boundary along the dorsal flank,