The increasing number of species for which a full genome sequence is available offers rich pickings for geneticists, but comparative analysis and assembly of information gathered across species does not always lead to answers about the function of a particular gene. This paper aims to place the invertebrate model system--the fly Drosophila melanogaster--into this playing field and to discuss how the organism arrived at its position in functional genetic analysis. Indeed, despite the wealth of knowledge on how a fly lives, breathes and flies, this organism is likely to remain a player in the analysis of biological, disease and pharmaceutical processes. The fast genetics Drosophila offers, combined with a well-annotated genome and a wealth of techniques facilitating gene function discovery, will ensure its place in functional genomics for some time to come. Although the fly cannot speak, it certainly can tell a tale.
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