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  1. Feb 9, 2024 · Weismann concluded that the hereditary endowment of the organism, which he called the germ plasm, is wholly separate and is protected against the influences emanating from the rest of the body, called the somatoplasm, or soma. The germ plasm–somatoplasm are related to the genotype–phenotype concepts, but they are not identical and should ...

  2. Jan 26, 2024 · In 1883 the great German biologist August Weismann proposed the germ plasm theory of hereditary. The Germ Plasm theory states that an organism cells are divided into somatic cells, the cells that make up the body and the germ cells, the cells that produce the gametes. The somatoplasm was not able to enter the sex cells.

  3. › wiki › LamarckismLamarckism - Wikipedia

    1 day ago · Weismann's experiment August Weismann's germ plasm theory. The hereditary material, the germ plasm, is confined to the gonads and the gametes. Somatic cells (of the body) develop afresh in each generation from the germ plasm, creating an invisible "Weismann barrier" to Lamarckian influence from the soma to the next generation.

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    Jan 26, 2024 · August Weismann was one of the most influential biologists of the late nineteenth century. In The Germ-Plasm he lays out a new theory of heredity, one based on the continuity of the germ-plasm (the gametes and the cells that give rise to the gametes) as opposed to the finite existence of the soma (the cells of the body).

  6. Feb 2, 2024 · Germ theory, in medicine, the theory that certain diseases are caused by the invasion of the body by microorganisms. The French chemist and microbiologist Louis Pasteur, the English surgeon Joseph Lister, and the German physician Robert Koch are given much of the credit for development and acceptance of the theory.

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  7. Feb 8, 2024 · The concept of contagion is entangled with so many themes in the history of medicine that any on-line collection on the subject can hardly fail to generate interest among the scholarly community. Harvard University’s Contagion: Historical Views of Disease and Epidemics does not disappoint. Presenting a wide range of digital sources ...

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