Dr. Gleason focuses on behavioral genetics, quantitative trait evolution in drosophila, drosophila courtship song and molecular evolution. Specifically she is looking at sexual isolation. Her research uses two species that do not normally mate with each other. These species differ in female cuticular hydrocarbons (detected by the males) and male courtship songs (produced by wing vibrations and heard by females). Preliminary results indicate that songs are polygenic, but surprisingly are influenced by genes of major effect that are probably not those identified in single gene mutation analyses.