Morgan, Thomas Hunt
Morgan, Thomas Hunt (1866–1945) US geneticist, who held professorships at Bryn Mawr College (1891–1904), Columbia University (1904–28), and the California Institute of Technology (1928–45). He established that chromosomes were the carriers of Mendel's `factors' of inheritance (genes). Working with fruit flies (Drosophila), he demonstrated the phenomenon of linkage and modified Mendel's law of independent assortment by stating that this could only apply to genes located on different chromosomes. He showed that linkage could be broken by crossing over and went on to produce the first chromosome maps. For his work Morgan was awarded the 1933 Nobel Prize for physiology or medicine.
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Gene , The gene is the physical unit of heredity. For each physical trait—such as eye color, height, hair color—a person inherits two genes or two groups of… Drosophila , The common fruit fly Drosophila melanogaster is a human commensal typically seen hovering around garbage cans or the bananas in kitchen fruit bowls.… Regulator Gene , regulatory gene In the operon theory of gene regulation, a gene that is involved in switching on or off the transcription of structural genes. When t… Linkage , linkage •abridge, bridge, fridge, frig, midge, ridge •quayage • verbiage • foliage • lineage •ferriage •stowage, towage •buoyage, voyage •sewage •Bab… Pseudogenes , Pseudogenes are defective copies of functional genes. These may be partial or complete duplicates derived from polypeptide-encoding genes or RNA gene… Hermann Muller , Muller, Hermann
Muller, Hermann
Geneticist 1890-1967
Hermann Joseph Muller was one of the founding members of the "fly lab" that was initiated by Tho…
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