Movie 1.

Gastrulation delay in wnt11b mutants. Representative time lapse movies of control heterozygous embryos (left) or wnt11b^-/- mutant embryos (right). Embryos were imaged beginning around stage 10.5 and frames were captured every 10 minutes for nine hours. The time is displayed in the upper left; hr:min:sec. Related to Fig. 1E.