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Hermann Joseph Muller studied the effects of x-ray radiation on genetic material in the US during the twentieth century. At that time, scientists had…
Muller, H. J. (Hermann Joseph), 1890-1967X-raysRadiationGeneticsMutationBacteria of the genus Wolbachia are bacteria that live within the cells of their hosts. They infect a wide range of arthropods (insects, arachnids…
WolbachiaBacteriaHost-bacteria relationshipsHost-parasite relationshipsArthropodsAll cells that have a nucleus, including plant, animal, fungal cells, and most single-celled protists, also have mitochondria. Mitochondria are…
CellsCell organellesMitochondriaPlant mitochondriaEndosymbiosisDr. John Rock, a doctor of obstetrics and gynecology in Boston, and Miriam Menkin, Rock s hired lab technician, were the first researchers to…
Fertilization in VitroExperimentsReproductionFertilizationWhen 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 CellsMosaicismAs one of the researchers involved in the development of the oral contraceptive pill, Min Chueh Chang helped to revolutionize the birth control…
ContraceptionReproductionBiographyThe Y-chromosome is one of a pair of chromosomes that determine the genetic sex of individuals in mammals, some insects, and some plants. In the…
Y ChromosomeSex ChromosomesEmbryosDNAChromosomesHermann Joseph Muller conducted three experiments in 1926 and 1927 that demonstrated that exposure to x-rays, a form of high-energy radiation, can…
X-raysRadiationGeneticsMutationDrosophilaDavid Edwin Wildt developed and applied assisted reproductive technologies to conserve rare and endangered wildlife species in the US during the…
CheetahFertilization in VitroEmbryo transplantationReproductive technologyEndangered SpeciesIn 1832, Charles Knowlton published The Fruits of Philosophy, a pamphlet advocating for controlling reproduction and detailing methods for preventing…
LiteratureBirth ControlObscenity (Law)--Great BritainPublications