AP BIOLOGY

Detailed explanation-1: -There is a 75% chance of having children that are tasters for PTC and a 25% chance of having children that are non-tasters.

Detailed explanation-2: -PTC is a bitter-tasting chemical similar to one found in broccoli and brussel sprouts that three out of every four people can taste. With this trait, two parents who can’t taste PTC rarely have a child that can taste it.

Detailed explanation-3: -The ratio of tasters to non-tasters varies between populations, but every group has some tasters and some non-tasters. On average, 75% of people can taste PTC, while 25% cannot.

Detailed explanation-4: -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.

Detailed explanation-5: -Tasters are those who taste the substance (PTC) while non-tasters cannot taste at all. Tasters have the genotype TT and the non-tasters have tt. 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.