老虎机与基因突变 The Luria-Delbruck experiment Hy pothesis 1: Resistance is a physiological response to a bactericide 1500d0d6 Hy pothesis 2: Resistance arises from random mutation 6000000000600000000000000 b Cultures ( Time of exposure to selective agent Salvador luria和 Max Delbruck的突变实验(1943年)Salvador Luria和Max Delbruckd的突变实验（1943年） 老虎机与基因突变