title: Developmental control of three-dimensional polarity in the avian limb.
mesh_terms: D000818:Animals; D001717:Birds / Q000196:embryology*; D002454:Cell Differentiation; D002642:Chick Embryo; D004372:Ducks; D004475:Ectoderm; D005121:Extremities / Q000196:embryology*; D007866:Leg / Q000196:embryology; D008648:Mesoderm; D009024:Morphogenesis; D009154:Mutation; D011784:Quail; D014921:Wings, Animal / Q000196:embryology