Weismann cut off tails of mice generation after generation but tails neither disappeared nor shortened showing that
Weismann cut off tails of mice generation after generation but tails neither disappeared nor shortened showing that
The correct option is D Lamarckism was wrong in inheritance of acquired characters.
Lamarck proposed a theory explaining the inheritance of acquired characters which states that whatever characters an individual acquires in its lifetime due to internal vital force, effect of environment, new needs and use and disuse of organs, they are inherited to the next generations. The process continues. After several generations, the variations are accumulated up to such extent that they give rise to new species. This theory was proved wrong by August Weismann. August Weismann put forward the theory of continuity of germplasm.
According to this, characters influencing the germ cells are only inherited. There is a continuity of germplasm (protoplasm of germ cells) but the somato-plasm (protoplasm of somatic cells) is not transmitted to the next generation, hence it does not carry characters to 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.
Lamarckism was wrong in inheritance of acquired characters.
Lamarck proposed a theory explaining the inheritance of acquired characters which states that whatever characters an individual acquires in its lifetime due to internal vital force, effect of environment, new needs and use and disuse of organs, they are inherited to the next generations. The process continues. After several generations, the variations are accumulated up to such extent that they give rise to new species. This theory was proved wrong by August Weismann. August Weismann put forward the theory of continuity of germplasm.
According to this, characters influencing the germ cells are only inherited. There is a continuity of germplasm (protoplasm of germ cells) but the somato-plasm (protoplasm of somatic cells) is not transmitted to the next generation, hence it does not carry characters to 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.
