PTC TASTING

 

PTC TASTING

Phenylthiocarbamide tasting, also called PTC tasting, a genetically controlled ability to taste phenylthiocarbamide (PTC) and a number of related substances, all of which have some anti-thyroid activity.

The ability to taste PTC is a dominant genetic trait, and the test to determine PTC sensitivity is one of the most commonly used genetic tests on humans.

Inability to taste PTC is sometimes described as an autosomal recessive trait: persons with the TT or Tt genotypes have the "taster" phenotype, persons with the tt genotype have the "non-taster" phenotype.  The "non-taster" phenotype is therefore described as a "recessive" trait.