title: [Mechanisms maintaining the genetic variability in a population (author's transl)].
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D002980:Climate; D004330:Drosophila / Q000235:genetics*; D004950:Esterases / Q000235:genetics; D014644:Genetic Variation; D009154:Mutation; D013696:Temperature
chemical_list: D004950:Esterases