Theory of continuity of germplasm was give by August Weismann $(1834-1914).$

Theory of continuity of germplasm by August Weismann $(1834-1914).$ A German biologist, was the main opposer of the inheritance of acquired characters. He put forward the theory of continuity of germplasm. According to Weismann, the characters influencing the germ cells are only inherited. There is a continuity of germplasm (protoplasm of germ cells) but the somatoplams (protoplasm of somatic cells) is not transmitted to the next generation. Hence, it do not carry characters to the next generation. Weismann cut off the tails of rats for as many as $22$ generations and allowed them to breed, but tailless rats were never born