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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 BiologyThrough various studies developmental biologists have been able to determine that the muscles of the back, ribs, and limbs derive from somites.…
SomitesExperimentsSomatic cellsVertebratesBiology textbooks are everybody's business. In accepting the view that texts are created with specific social goals in mind, I examined 127 twentieth…
TextbooksBook IllustrationsPictorial WorkPublicationsIntroduced by Conrad Hal Waddington in 1942, the concept of epigenetics gave scientists a new paradigm of thought concerning embryonic development,…
EpigenomicsEpigeneticsIn 2004, the South Korean geneticist Woo-Suk Hwang published what was widely regarded as the most important research finding in biotechnology that…
ethicsInformed consent (Medical law)Scientific MisconductFraud, ScientificScientific DishonestyWilhelm Roux was an influential figure in the early history of experimental embryology. Although he originally studied medicine, he was invited to be…
LiteratureRoux, Wilhelm, 1850-1924ExperimentsFrogsOvaEarly 1990s research conducted by Peter Koopman, John Gubbay, Nigel Vivian, Peter Goodfellow, and Robin Lovell-Badge, showed that chromosomally…
Y ChromosomeTestisEmbryosChromosomesSex ChromosomesWhen scientists discovered a 3.3 million-year-old skeleton of a child of the human lineage (hominin) in 2000, in the village of Hadar, Ethiopia, they…
Human remains (Archaeology)Prehistoric peoplesAntiquities, PrehistoricArcheologyAnthropology, PhysicalConrad Hal Waddington's "Experiments on the Development of Chick and Duck Embryos, Cultivated in vitro," published in 1932 in Philosophical…
Waddington, C. H. (Conrad Hal), 1905-1975ExperimentsChicksDucksMatthew Meselson, Franklin Stahl, and Jerome Vinograd, developed cesium chloride, or CsCl, density gradient centrifugation in the 1950s at the…
TechnologyDNA ReplicationDNA replication--RegulationCentrifugation, Density GradientOrganonitrogen compounds