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When cells-but not DNA-from two or more genetically distinct individuals combine to form a new individual, the result is called a chimera. Though…
ContextChimerismEmbryosEmbryonic Stem CellsMosaicismPetr Kropotkin proposed the theory of Pleistocene ice age, alternative theories of evolution based on embryology, and he advocated anarchist and…
EvolutionHeredityInheritance of acquired charactersPaleogeography--PleistoceneAnarchismIn “Explaining Recent Declines in Adolescent Pregnancy in the United States: The Contribution of Abstinence and Improved Contraceptive Use,”…
LiteraturePregnancy, AdolescentBirth ControlFirst pregnancyReproductive HealthThe Baby Doe Rules represent the first attempt by the US government to directly intervene in treatment options for neonates born with congenital…
LawCongenital, Hereditary, and Neonatal Diseases and AbnormalitiesReproductionCongenital DisordersIn the case York v. Jones (1989), the United States District Court for the Eastern District of Virginia was one of the first US courts to address a…
LawFrozen human embryosFertilization in VitroConceptionAbortionStem cells are undifferentiated cells that are capable of dividing for long periods of time and can give rise to specialized cells under particular…
Stem CellsReproductiondifferentiationHuman DevelopmentIn Jeter v. Mayo, the Court of Appeals of Arizona in 2005 held that a cryopreserved, three-day-old pre-embryo is not a person for purposes of Arizona…
LawCryopreservationEmbryo transplantationFrozen human embryosFertilization in VitroHermaphrodites and the Medical Invention of Sex, by historian of science Alice Domurat Dreger, was published in 1998 by Harvard University Press. In…
LiteratureIntersex peopleGonads--DiseasesDisorders of Sex DevelopmentSexGolden Rice was engineered from normal rice by Ingo Potrykus and Peter Beyer in the 1990s to help improve human health. Golden Rice has an engineered…
TechnologyRiceBiotechnologyGenesMolecular BiologyIn the July 2007 issue of Nature, Keisuke Okita, Tomoko Ichisaka, and Shinya Yamanaka added to the new work on induced pluripotent stem cells (iPSCs…
LiteratureStem CellsPublicationsSomatic cells