Genotypic variation of the bitter taste perception gene TAS2R38 and its effect on caffeine consumption and smoking behaviour

 Genes encoding for bitter taste receptors are primarily found on chromosome 7 and 12, clustered together in a TAS2R gene family. The bitter sensitivity depends on the alleles of the receptor gene, which vary across individuals.  The TAS2R38 gene, located on chromosome 7, was used to see the correlation of the student's smoking habit and coffee consumption and their bitter taste sensitivity.