... embryos were indistinguishable from wild type ( Fig. 2U ). In igu, lep, uki and ptc1 +/– ; lep –/– embryos, the lateral crista was lost or reduced in 29, 45, 77 and 100% of cases, respectively ( Fig. 2B-H,U ). In a number of uki mutants we also observed an additional small domain of msxc...