Fig. 1. Fgf8 hypomorphs have variable length outflow tracts.
(A-D) Fgf8neo/lacZ embryos that undergo relatively
normal gastrulation demonstrate OT of variable lengths from mild (B) to
moderate and severe (C,D) when compared with control at E9.5 (A). OT, outflow
tract; V, ventricle; 1, first pharyngeal arch.