Segnali tra cellule come modulatori del differenziamento. Developmental response of one set of cells to their neighbours Also called secondary induction Notochord Signals from notochord induce neural floor plate cell formation Remove notochord and floor plate doesn’t form Formation of neural floor plate induced by notochord Example of instructive interaction Cells may be committed to a pathway and simply require the appropriate environment – permissive interaction. Possession of the appropriate cellular machinery to allow response to an inductive signal Continua »