Timed reciprocal dermal-epidermal interactions between comb, mid-dorsal, and tarsometatarsal.
D000818:Animals; D002454:Cell Differentiation; D002642:Chick Embryo / Q000254:growth & development*; D003129:Comb and Wattles / Q000196:embryology*; D005069:Evaluation Studies as Topic; D005241:Feathers; D005865:Gestational Age; D012867:Skin / Q000196:embryology*; D016038:Skin Transplantation; D013997:Time Factors; D014184:Transplantation, Homologous