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Theodosius DobzhanskyAmerican geneticist and evolutionist of Russian origin.
Date of Birth: 25.01.1900
Country:  Ukraine |
Content:
- Early Life and Education
- Academic and Professional Career
- Emigration and Work in the United States
- Return to Columbia and Rockefeller University
- Scientific Contributions
- Drosophila Experiments
- Natural Selection and Evolutionary Theory
- Major Publications
- Later Years and Legacy
Early Life and Education
Born on January 25, 1900, in Nemirov (present-day Ukraine), Theodosius Dobzhansky was a geneticist and evolutionary biologist of Russian descent. In 1921, he graduated from the Kiev University, where he subsequently worked as a zoology lecturer until 1924.
Academic and Professional Career
Leningrad UniversityFrom 1924 to 1927, Dobzhansky served as a genetics professor at Leningrad University.
Emigration and Work in the United States
In 1927, he immigrated to the United States. He worked under the renowned geneticist T.H. Morgan at Columbia University and later joined him at the California Institute of Technology in Pasadena from 1928 to 1940.
Return to Columbia and Rockefeller University
In 1940, Dobzhansky returned to Columbia University. From 1962 to 1971, he became a professor at the Rockefeller University in New York.
Scientific Contributions
Population GeneticsDobzhansky's research interests revolved around animal variability and evolution. He was a foundational figure in population genetics, a vital field in biology. During an expedition to Central Asia in 1926-1927, he conducted studies on agricultural animal populations, laying the groundwork for his work in this area.
Drosophila Experiments
Dobzhansky used fruit flies (Drosophila) as his model organism to explore genetic and evolutionary processes. He identified the genetic basis for population polymorphism and demonstrated that different strains of Drosophila had advantages under varying environmental conditions.
Natural Selection and Evolutionary Theory
Together with J.M. Smith, Dobzhansky measured the rate of natural selection in natural and experimental populations. His research contributed to the understanding of new species and the development of the synthetic theory of evolution.
Major Publications
Dobzhansky authored influential books, including:"Genetics and the Origin of Species" (1941)
"Evolution, Genetics and Man" (1955)
"The Biological Basis of Human Freedom" (1956)
Honors and Awards
Dobzhansky was recognized for his scientific achievements with the Elliott Medal from the National Academy of Sciences. He was a member of the Royal Society of London, the German Academy of Sciences Leopoldina, the Swedish Academy of Sciences, and the Royal Danish Society.
Later Years and Legacy
Theodosius Dobzhansky passed away on December 18, 1975, in Davis, California. His work in population genetics and evolutionary biology had a profound impact on the field and continues to inspire generations of scientists.
