Normal craniofacial and kidney morphology in newborn 3H1 +/+ mice (A,B) compared to representative 3H1 Br/Br (C,D), 3H1 x Cast N2 Br/Br (E,F) and 3H1 x Balb N2 Br/Br (G,H) mutant hybrid mice displaying frontonasal dysplasia and renal hypoplasia. a = adrenal gland; k = kidney. Bar in G = 5 mm; Bar in H = 1 mm.