The ability to taste phenylthiocarbamide (PTC) is determined by a specific gene known as TAS2R38. The two primary genotypes related to PTC tasting are:
-
Taster Genotype (T): Individuals who possess at least one "T" allele (genotypes TT or Tt) are able to taste PTC. These individuals often find PTC to have a bitter taste.
-
Non-Taster Genotype (t): Individuals with the genotype tt do not taste PTC and generally do not perceive the bitter flavor associated with it.
In summary, those with genotypes TT or Tt can taste PTC, while those with the tt genotype cannot.