A method for the mobilization of a transposable element is provided. The method comprises the steps of a) providing an inhibitor of DNA methylation, and/or an inhibitor of transcription, and b) contacting the inhibitor(s) with a cell comprising inactivated transposable elements, yielding a cell with mobilized transposable elements. In a second aspect of the invention a method for increasing the genetic and/or epigenetic variation in a plurality of eukaryotic organisms is provided. The method comprises the steps of i. providing an inhibitor of DNA methylation and/or an inhibitor of transcription, ii. contacting the organism with the inhibitor(s) and iii. propagating the organism.