“…Family and twin studies suggest this trait is inherited as a Mendelian recessive, with two alleles typically represented as T and t, with T representing the 'tasting' allele and t the 'non-tasting' allele (Blakeslee 1931, Snyder 1931, Blakeslee 1932, Levit and Soboleva 1935, Lee 1937, Rife 1938, Hogben 1946, Matsunaga and Tsuji 1957, Merton 1958, Pons 1960, Martin 1975, Rao and Morton 1977, Forrai and Bankovi 1984, Whissell-Buechy 1990b. The evidence for a genetic component underlying the PTC tasting ability is so strong that it was once used in paternity tests before DNA markers were available (Cardullo and Holt 1951). The ability to taste PTC is listed as a genetic trait (McKusick 1995), (MIM No.…”