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Theodosius Dobzhansky

Died 18 Dec 1975 at age 75 (born 25 Jan 1900). Ukrainian-American geneticist and evolutionist whose work had a major influence on 20th-century thought and research on genetics and evolutionary theory. He made the first significant synthesis of Charles Darwin's theory of evolution with Gregor Mendel's theory of genetics in his book Genetics and the Origin of Species (1937). From 1918 his research gave experimental evidence that genes could vary far more than geneticists had previously believed. Thus, successful species tend to have a wide variety of genes that, while redundant in its present environment, do provide a species as a whole with genetic diversity. Such diversity enables the species to adapt effectively to changes in the surrounding environment—the basis for modern evolutionary theory.

A friend of mine tri...

“A friend of mine tried to annoy me with bird puns, but I soon realized that toucan play at that game.”

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