Theodosius Dobzhansky
Theodosius Dobzhansky entered the world on the 25th of January 1900 in Nemirov within the Russian Empire. His parents were Grigory and Sophia Voinarsky. They named him Theodosius after a saint because they had prayed for a child to St. Theodosius of Chernigov before his birth. This unusual name marked the beginning of a life that would bridge science and faith. The family moved to Kiev in 1910 where young Theodosius began collecting butterflies at high school. He decided then to become a biologist but changed his focus after meeting Victor Luchnik in 1915. Luchnik convinced him to study beetles instead of butterflies. Dobzhansky attended the University of Kiev until 1924 specializing in entomology.
Dobzhansky immigrated to the United States in 1927 at the age of 27. He arrived in New York City on December 27 with a work-study scholarship from the Rockefeller Foundation. Upon arrival he joined the Drosophila Group at Columbia University. There he worked alongside Thomas Hunt Morgan and Alfred Sturtevant. Their collective research provided crucial information on Drosophila cytogenetics. Dobzhansky helped establish Drosophila pseudoobscura as a favorable model organism in evolutionary-biological studies. His original mindset held serious doubts about using data from local populations to explain global scale phenomena. Filipchenko had also believed there were only two types of inheritance. Dobzhansky later stated that Filipchenko bet on the wrong horse regarding these theories.
Genetics and the Origin of Species appeared in print during 1937. This book became one of the most important works ever written in genetics and evolution. The first edition highlighted recent discoveries in genetics and how they applied to the concept of evolution. It covered the chromosomal basis of Mendelian Inheritance and explained how mutations form racial and specific differences. Dobzhansky described three levels for evolutionary population genetics including the origin of raw materials by mutations. The second edition published four years later added new research to the last two chapters. The third revision released in 1951 rewrote all ten chapters on topics like Isolating Mechanisms and Adaptive Polymorphism. Each edition removed material deemed no longer crucial while adding precise quantitative evidence on effective natural selection.
Dobzhansky engaged in a public disagreement with Ashley Montagu over the term race spanning many years. Montagu argued that race was so laden with toxic associations it should be eliminated from science completely. Dobzhansky countered that science should not give in to misuses where the concept had been subjected. He believed the modern synthesis used the concept to describe diverging biological populations differing in gene frequencies. Harrison E. Salisbury wrote in a New York Times review that scientists could not agree upon what defines a race. Dobzhansky stated that a true bloodline for man could not be identified. He did not believe genetic makeup decided whether someone would be great but rather that humans have the rare opportunity to direct their own evolution.
Dobzhansky received a diagnosis of lymphocytic leukemia on the 1st of June 1968. His wife Natasha died of coronary thrombosis on the 22nd of February 1969. He retired in 1971 moving to the University of California Davis where he continued working as an emeritus professor. By the 11th of November 1975 his leukemia had become more severe so he traveled to San Jacinto for treatment. He worked until his last day as a professor before dying from heart failure on the 18th of December 1975 in Davis. His ashes were scattered in the Californian wilderness. He was awarded the U.S. National Medal of Science in 1964 and the Franklin
Medal in 1973. Theodosius Dobzhansky remains a central figure in evolutionary biology for shaping the modern synthesis.
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Common questions
When and where was Theodosius Dobzhansky born?
Theodosius Dobzhansky entered the world on the 25th of January 1900 in Nemirov within the Russian Empire. His parents were Grigory and Sophia Voinarsky, who named him after a saint they prayed to before his birth.
What major book did Theodosius Dobzhansky publish in 1937?
Genetics and the Origin of Species appeared in print during 1937 as one of the most important works ever written in genetics and evolution. This book covered the chromosomal basis of Mendelian Inheritance and explained how mutations form racial and specific differences.
How did Theodosius Dobzhansky contribute to Drosophila research at Columbia University?
Dobzhansky joined the Drosophila Group at Columbia University upon arrival in New York City on the 27th of December 1927 with a Rockefeller Foundation scholarship. He helped establish Drosophila pseudoobscura as a favorable model organism in evolutionary-biological studies while working alongside Thomas Hunt Morgan and Alfred Sturtevant.
Why did Theodosius Dobzhansky disagree with Ashley Montagu about race?
Theodosius Dobzhansky engaged in a public disagreement with Ashley Montagu over the term race spanning many years because he believed science should not give in to misuses where the concept had been subjected. He argued that the modern synthesis used the concept to describe diverging biological populations differing in gene frequencies.
When did Theodosius Dobzhansky die and what was his cause of death?
Theodosius Dobzhansky died from heart failure on the 18th of December 1975 in Davis after traveling to San Jacinto for treatment of severe leukemia. His ashes were scattered in the Californian wilderness following his death.