Fig. 7. Posterior mesoderm is still induced but not maintained in MZoep;ace mutants. (A-B) Live embryos at 30 hours of development taken from the progeny of oep^–/–;ace^–/+ parents (genotype top right). (C-V) Whole mount in situ hybridization of embryos taken from the progeny of oep^–/–;ace^–/+ parents and oep^–/– parents (genotype top right). MZoep;ace embryos were genotyped for the ace allele. We systematically compared the phenotypes of the progeny of oep^–/–;ace^–/+ parents with those of the progeny of oep^–/– parents. The stage is shown bottom right and the probe is indicated bottom left. Dorsal is to the right. Lateral views of embryos (C,E,H,J). Animal-pole views (D,F,G,I,K-N,R,S). Vegetal-pole views (O-Q,T-V).