show Abstracthide AbstractThe goal of this work was to identify genome regions that influence assortative mating between Drosophila simulans and D. sechellia. The two species are a genetic model for interspecific hybridization, since they were recently found to be mixing in wild populations. By learning the genes and studying their qualities in a genetic model system, we hope to understand how they will determine whether these species blend together, become more separate through reinforcement, or persist as 'hybrid swarms'.