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Edmund Beecher Wilson experimented with Amphioxus (Branchiostoma) embryos in 1892 to identify what caused their cells to differentiate into new types…
Wilson, Edmund B. (Edmund Beecher), 1856-1939AmphioxusEmbryosEmbryologyDevelopmental BiologyFriedrich Leopold August Weismann published Das Keimplasma: eine Theorie der Vererbung (The Germ-Plasm: a Theory of Heredity, hereafter The Germ-…
LiteratureWeismann, August, 1834-1914. Keimplasma. EnglishGerm CellsHeredityInheritance of acquired charactersIn the first decade of the twentieth century, Paul Kammerer, a zoologist working at the Vivarium in Vienna, Austria, conducted research on…
Kammerer, Paul, 1880-1926Midwife toadsKammerer, Paul, 1880-1926. Streitfrage der Vererbung erworbener Eigenschaften. EnglishInheritance of acquired charactersAdaptationIn the early twentieth century, Paul Kammerer conducted a series of experiments to demonstrate that organisms could transmit characteristics acquired…
Kammerer, Paul, 1880-1926SalamandraLaboratory animals--Breeding--ExperimentsLamarck, Jean Baptiste Pierre Antoine de Monet de, 1744-1829. Philosophie zoologique. EnglishHeredityHarry Hamilton Laughlin helped lead the eugenics movement in the United States during the early twentieth century. The US eugenics movement of the…
Laughlin, Harry Hamilton, 1880-1943American Eugenics SocietyEugenicsDavenport, Charles Benedict, 1866-1944Eugenics--United States--HistoryPaul Kammerer conducted experiments on amphibians and marine animals at the Vivarium, a research institute in Vienna, Austria, in the early twentieth…
Kammerer, Paul, 1880-1926Kammerer, Paul, 1880-1926. Streitfrage der Vererbung erworbener Eigenschaften. EnglishInheritance of acquired charactersAdaptationMidwife toadsTheophilus Shickel Painter studied the structure and function of chromosomes in the US during in the early to mid-twentieth century. Painter worked…
ChromosomesKaryotypesSex ChromosomesGeneticsLinkage (Genetics)The American Eugenics Society (AES) was established in the US by Madison Grant, Harry H. Laughlin, Henry Crampton, Irving Fisher, and Henry F.…
OrganizationsEugenicsHeredity, HumanHeredityInvoluntary SterilizationVictor Jollos studied fruit flies and microorganisms in Europe and the US, and he introduced the concept of Dauermodifikationen in the early 1900s.…
ParameciumDrosophilaHeredityProtistaprotozoologyIn 1868 in England, Charles Darwin proposed his pangenesis theory to describe the units of inheritance between parents and offspring and the…
HeredityDarwin, Charles, 1809-1882ReproductionEvolutionNatural selection