In this virtual lab, users get to perform restriction digest and gel electrophoresis to analyze an unknown sample, to determine which alleles of TAS2R38 are present. This lab is designed at an introductory level, and emphasizes the reagents and steps necessary for restriction digest and gel electrophoresis. (Prior knowledge of DNA structure, micropipetting, and PCR is helpful.) To learn more about PCR and explore how a region would have been amplified before analysis, see Using PCR to Amplify a Gene.