Indiana University School of Medicine-South Bend 1 article published in JoVE Neuroscience Taste Preference Assay for Adult Drosophila Andrew P. Bantel1, Charles R. Tessier1 1Department of Medical and Molecular Genetics, Indiana University School of Medicine-South Bend Taste is an important sensory process which facilitates attraction to beneficial substances and avoidance of toxic substances. This protocol describes a simple ingestion assay for determining Drosophila gustatory preference for a given chemical compound.