john b. watson refuted the theory of pangenesis with his classic experiment on mice tails.
john b. watson refuted the theory of pangenesis with his classic experiment on mice tails.
who refuted the theory of pangenesis with his classic experiment on mice tails?
john b. watson
Na
Na
august weismann's idea, set out in his 1892 book "das keimplasma: eine theorie der vererbung" (the germ plasm: a theory of inheritance), was that the hereditary material, which he called the germ plasm, and the rest of the body (the soma) had a one-way relationship: the germ-plasm formed the body, but the body did not influence the germ-plasm, except indirectly in its participation in a population subject to natural selection. this distinction is commonly referred to as the weismann barrier. if correct, this made darwin's pangenesis wrong and lamarckian inheritance impossible. his experiment on mice, cutting off their tails and showing that their offspring had normal tails across multiple generations, was proposed as a proof of the non-existence of lamarckian inheritance, although peter gauthier has argued that weismann's experiment showed only that injury did not affect the germ plasm and neglected to test the effect of lamarckian use and disuse. weismann argued strongly and dogmatically for darwinism and against neo-lamarckism, polarising opinions among other scientists. this increased anti-darwinian feeling, contributing to its eclipse.
pangenesis