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August Weismann. August Friedrich Leopold Weismann FRS (For), HonFRSE, LLD (17 January 1834 – 5 November 1914) was a German evolutionary biologist. Fellow German Ernst Mayr ranked him as the second most notable evolutionary theorist of the 19th century, after Charles Darwin. Weismann became the Director of the Zoological Institute and the ...
Evolution is the theory that all the kinds of living things that exist today developed from earlier types. The differences between them resulted from changes that happened over many years. The simplest forms of life arose at least 3.5 billion years ago. Over time they evolved into the millions of species, or types, of living things alive today.
Apr 15, 2024 · August Weismann (born January 17, 1834, Frankfurt am Main—died November 5, 1914, Freiburg im Breisgau, Germany) was a German biologist and one of the founders of the science of genetics. He is best known for his opposition to the doctrine of the inheritance of acquired traits and for his “germ plasm” theory, the forerunner of DNA theory.
August Weismann. August Friedrich Leopold Weismann FRS (For), HonFRSE, LLD (17 January 1834 – 5 November 1914) was a German evolutionary biologist. Fellow German Ernst Mayr ranked him as the second most notable evolutionary theorist of the 19th century, after Charles Darwin. Weismann became the Director of the Zoological Institute and the ...
germ-plasm theory, concept of the physical basis of heredity expressed by the 19th-century biologist August Weismann (q.v.).According to his theory, germ plasm, which is independent from all other cells of the body (somatoplasm), is the essential element of germ cells (eggs and sperm) and is the hereditary material that is passed from generation to generation.
- The Editors of Encyclopaedia Britannica
Jun 3, 2022 · August Weismann and Oscar Hertwig provided particularly strong and contrasting positions. Weismann had begun from an epigenetic viewpoint and initially rejected the idea that individual form emerges through the unfolding, or evolution, of pre-existent form in the inherited germ.
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August Weismann’s challenge of the entire theory of the transmission of acquired characteristics marks a turning point from the older credulous attitude to the modern demand for more critical evidence. Weismann’s conclusions, based on a few questionable experiments, can scarcely be regarded as convincing.
