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Multiple theories about what determines sex were tested at the turn of the twentieth century. By experimenting on germ cells, cytologist Nettie Maria…
PeopleHeredityReproductionBiographyEdmund Beecher Wilson contributed to cell biology, the study of cells, in the US during the end of the nineteenth and the beginning of the twentieth…
EmbryologyCellsCytologyHeredityEvolutionIn 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 selectionEdmund 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 BiologyAt the turn of the twentieth century, William Bateson studied organismal variation and heredity of traits within the framework of evolutionary theory…
GeneticsHeredityMendel, Gregor, 1822-1884EvolutionEmbryologyIn 2002 Eric Davidson and his research team published 'A Genomic Regulatory Network for Development' in Science. The authors present the first…
LiteratureGene regulatory networksSystems BiologyGenetic regulationGenesJulia Bell worked in twentieth-century Britain, discovered Fragile X Syndrome, and helped find heritable elements of other developmental and genetic…
Genetic Disordersfetal developmentRubella in pregnancyRubella virusHeredityFriedrich 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 1881 British opthalmologist Warren Tay made an unusual observation. He reported a cherry-red spot on the retina of a one-year-old patient, a…
Tay-Sachs DiseaseCongenital DisordersHeredityAugust Friedrich Leopold Weismann studied how the traits of organisms developed and evolved in a variety of organisms, mostly insects and aquatic…
Germ CellsHeredity