Yahoo Web Search

  1. About 145,000 search results

      • The forerunner of Modern Genetics, August Weismann was born in Germany in 1834. Basically he was a biologist who cancelled the popular belief that acquired characters are inherited. He demonstrated his view that new born mice still managed to inherit the complete tail structure even after twenty two generations of cutting the tail of mice.
      www.biologydiscussion.com/genetics/geneticists/list-of-14-eminent-geneticists-with-their-contributions/35674
  1. Jun 11, 2018 · Weismann, who was the most notable of the Neo-Darwinists, claimed that natural selection alone could provide for the formation of varieties and, in time, species, although the Neo-Lamarckians found support on Darwin’s own admitted doubts as to the degree to which natural selection alone acted.

  2. 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. Weismann first proposed this ...

    • The Editors of Encyclopaedia Britannica
  3. August Weismann is famous for having argued against the inheritance of acquired characters. However, an analysis of his work indicates that Weismann always held that changes in external conditions, acting during development, were the necessary causes of variation in the hereditary material.

    • Rasmus Grønfeldt Winther
    • 2001
  4. gene. determinant, in genetics, the term used in the late 19th century by the German biologist August Weismann to describe the component of hereditary material, or germ plasm, that specifies the characteristics of different cells.

    • The Editors of Encyclopaedia Britannica
  5. Weismann became the Director of the Zoological Institute and the first Professor of Zoology at Freiburg . His main contribution involved germ plasm theory, at one time also known as Weismannism, [1] according to which inheritance (in a multicellular animal) only takes place by means of the germ cells —the gametes such as egg cells and sperm cells.

  6. Abstract Cytogerontology, the science of cellular ageing, originated in 1881 with the prediction by August Weismann that the somatic cells of higher animals have limited division potential. Weismann's prediction was derived by considering the role of natural selection in regulating the duration of an organism's life.

  1. People also search for