Regional influences on development of the single comb primordium.
D000818:Animals; D002454:Cell Differentiation; D002642:Chick Embryo; D003129:Comb and Wattles / Q000196:embryology* / Q000637:transplantation; D008938:Mitosis; D009024:Morphogenesis; D014182:Transplantation, Autologous