# Calvin Bridges

## Biography

Calvin Blackman Bridges was an influential American geneticist born in Schuyler Falls, New York, in 1889. Orphaned young, he was raised by his grandparents before attending Columbia University. As a freshman in 1909, Bridges joined Thomas Hunt Morgan’s pioneering "Fly Room," where he became a key member alongside Alfred Sturtevant and Hermann Joseph Muller. His meticulous work with the fruit fly, Drosophila melanogaster, was instrumental in establishing the chromosomal theory of heredity. Bridges is credited with discovering chromosomal non-disjunction, a process where chromosomes fail to separate correctly, and he developed detailed gene maps of the giant salivary gland chromosomes. He also contributed significantly to experimental techniques, designing improved equipment and a more efficient fly food. Bridges moved with Morgan to the California Institute of Technology in 1928 and was elected to the National Academy of Sciences in 1936. He passed away in 1938.

## Books

- [Sex-linked Inheritance in Drosophila](https://samolit.com/books/96472)