Posts Tagged ‘Drosophila’

The fruit fly is celebrating 100 years of research. Charles W. Woodworth at the University of California, Berkley, at the turn of the twentieth century, was the first to use the fruit fly as model in the study of genetics. Today, Drosophila melanogaster, the common fruit fly, has become one of the most studied organisms in biological research, particularly in the field of genetics.

In 1910 following Woodworth’s footsteps, at Columbia University from the top floor of Schermerhorn Hall, now known as the Fly Room, Thomas Hunt Morgan confirmed and extended Gregor Mendel’s basic principles of genetics. A year later, Morgan published his findings in Science, establishing the foundation for the emerging neo-Darwinism movement.

Morgan, in the book entitled The Mechanism of Mendelian Inheritance (1915) demonstrated how mutations using radiation on two-winged fruit flies resulted in four-winged fruit flies. The four-winged fruit fly was widely heralded as the earliest evidence that the first evolutionary step to produce a new species was a mutation.

The question, however, centered on whether the mutated four-winged fruit fly was a new species or an unsustainable aberrational freek. By 1963 after decades of research, the question could be answered definitively. Ernst Mayr, Charles Darwin’s twentieth century Bulldog, viewed the mutated four-winged fruit flies as “such evident freaks that these monsters can be designated only as ‘hopeless.’ They are so utterly unbalanced that they would not have the slightest chance of escaping elimination.” Mutation is not the gateway to evolution.

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