Fig. 7. Expression of otx2 and gbx1 and initial expression of fgf8, appear normal in spgm793 mutant embryos. Expression of otx2, gbx2, fgf8 (dark blue), and pax2.1 (red) in wild-type and spgm793 mutant embryos. Embryonic genotypes are indicated at the top; the genes for which expression is shown are on the left and right; and embryonic stages are indicated below. The genotype of embryos shown in A,B,E,F,I,J was determined by allele-specific PCR. Embryos are viewed from the dorsal side, anterior towards the top.