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Weismann, August Friedrich Leopold
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Weismann, August Friedrich Leopold
German biologist, one of the founders of genetics. He postulated that every living organism contains a special hereditary substance, the ‘germ plasm’, and in 1892 he proposed that changes to the body do not in turn cause an alteration of the genetic material.
This ‘central dogma’ of biology remains of vital importance to biologists supporting the Darwinian theory of evolution. If the genetic material can be altered only by chance mutation and recombination, then the Lamarckian view that acquired bodily changes can subsequently be inherited becomes obsolete.
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