L. C. Dunn

Leslie Clarence Dunn (November 2, 1893 in Buffalo, New York – March 19, 1974) was a developmental geneticist at Columbia University. His early work with the mouse T-locus and established ideas of gene interaction, fertility factors, and allelic distribution. Later work with other model organisms continued to contribute to developmental genetics. Dunn was also an activist, helping fellow scientists seek asylum during World War II, and a critic of eugenics movements.

Dunn was born in Buffalo, New York, in 1893, to Clarence Leslie Dunn and Mary Eliza Booth Dunn. He earned a bachelor's degree from Dartmouth College in 1915.

Dunn served in the Harvard Regiment in France during World War I, and after the war, returned to Harvard University to complete his degree in 1920. After the war, he identified as a pacifist. He worked from 1920 - 1928 as a poultry geneticist at an Agricultural Experiment Station in Storrs, Connecticut, publishing almost fifty papers during this time.

Dunn, along with colleague E. W. Sinnott, was the author of one of the foremost early genetics texts, Principles of Genetics (first published in 1925).

In 1928 Dunn was invited to join Columbia University as a full professor in the Zoology Department. While there, he was renowned for his teaching, and influenced numerous students, included "outstanding" developmental biologists Salome Gluecksohn-Waelsch and Dorothea Bennett.

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