Fig. 3. Tbx1 patterns Lfng and Bmp4 otocyst expression. Lateral surface views of whole mount hybridized embryos arrayed by stage and genotype. Arrowheads denote position of the Bmp4 anterior stripe. Black arrows highlight the position of posterior Bmp4 expression. White arrows mark the anterior region of Lfng/neural bHLH gene expression. Brackets in D and H mark the extent of diffuse anterodorsolateral Bmp4 expression in Tbx1^–/– otocysts. All images are shown to scale.