Olfaction in Drosophila: from odor to behavior.

Odors elicit a variety of behavioral responses from Drosophila via a relatively simple, but sensitive, olfactory system. An increasing number of mutants have been found to be defective in olfactory function. Genetic and molecular analyses of the Drosophila olfactory system have identified some of its molecular components, and have revealed some principles of its function and organization.