Spatial redistribution of remaining Hox genes in Hoxa13−/−;HoxDdel(11–13/del(11–13) and Hoxa13−/−;Hoxd13−/−. A–J: Embryonic day (E) 11.5 forelimb buds hybridized with Hoxd4 (A,B,I), Hoxd9 (C,D), Hoxd10 (E,F), and Hoxa11 (G,H,I). B,H–J: Note similar distal expansion of Hoxd4 (B,I) and Hoxa11 (H,J) in both genotypes.