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Fig. 10 Expression of forebrain-forming genes in foxg1a mutants at the tailbud and early somitogenesis stage. Expression of anterior forebrain markers (emx3, six3b) was examined by WISH in foxg1a mutants, followed by genotyping. Wild-type embryos including heterozygotes (left) and homozygotes (right) are shown. For each gene, the upper row and bottom row show embryos at the bud stage (a, a', c, c') and the 3-ss (b, b', d, d'), respectively. Dorsal views with the anterior side to the left. In the lower right are shown the numbers of embryos with the indicated expression and the numbers of assessed embryos. ank, anterior neural keel; pol, pollster. Scale bar, 100 μm.