I have been awarded an ENW-M-1 grant in NWO’s Open Competition ENW. With this project I will expand my research line on the balanced lethal system in Triturus newts. We know that only those Triturus offspring that possess two different forms of chromosome 1 survive, while those that receive the same form twice from their father and mother, exactly half of the total number, die. We will study developing embryos and their genes simultaneously, to figure out what exactly goes wrong in the unfortunate embryos.