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In humans, sex determination is the process that determines the biological sex of an offspring and, as a result, the sexual characteristics that they…
Sex DeterminationGenetic sex determinationIntersex peopleDiscrimination against intersex peopleStevens, N. M. (Nettie Maria), 1861-1912De ovi mammalium et hominis genesi (On the Genesis of the Ovum of Mammals and of Men) is an 1827 pamphlet by Karl Ernst von Baer about the anatomical…
LiteratureBaer, Karl Ernst von, 1792-1876developmentAnatomy, ComparativeGerm CellsThe Spandrels of San Marco and the Panglossian Paradigm: A Critique of the Adaptationist Programme, hereafter called The Spandrels, is an article…
LiteratureGould, Stephen JayEvolutionAdaptationBaer, Karl Ernst von, 1792-1876Ontogeny and Phylogeny is a book published in 1977, in which the author Stephen J. Gould, who worked in the US, tells a history of the theory of…
LiteratureEvolutionOntogenyEmbryologyMeckel, J. F. (Johann Friedrich), 1781-1833In 1828, while working at the University of Konigsberg in Konigsberg, Germany Karl Ernst von Baer proposed four laws of animal development, which…
Baer, Karl Ernst von, 1792-1876EmbryologyAnatomy, ComparativeIn nineteenth century Great Britain, Thomas Henry Huxley proposed connections between the development of organisms and their evolutionary histories,…
PeopleDarwin, Charles, 1809-1882EvolutionpaleontologyEmbryologyMesoderm is one of the three germ layers, groups of cells that interact early during the embryonic life of animals and from which organs and tissues…
MesodermGastrulationCell differentiationCellsTissuesEndoderm is one of the germ layers-- aggregates of cells that organize early during embryonic life and from which all organs and tissues develop.…
GastrulationEmbryosEmbryologyCellsTissues