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Transcript
Peas in a Pod: The Story of Heredity What determines the type of ice cream that you prefer; childhood experience and exposure to the flavor or your inherited traits? PTC (phenylthiocarbamide) The ability to taste PTC (or not) is conveyed by a single gene that codes for a taste receptor on the tongue. The PTC gene, TAS2R38, was discovered in 2003. Studies suggest a correlation between the ability to taste PTC and preferences for certain types of food (“PTC: Genes,” n.d.) Are you a taster or a non-taster? The PTC gene has about 85% of the total influence over whether someone is a taster or a non-taster (“PTC: Gene,” n.d). Environmental factors can influence PTC tasting. Inherited vs Acquired Traits inherited trait: a genetically determined characteristic or quality that distinguishes someone or something Inherited traits are passed in DNA from parents to their offspring. Kahoot! acquired trait: develops during the lifetime of the organism but are not in the organism’s DNA and are not inherited by its offspring Acquired traits are often learned. Dominant and Recessive Genes Dominant + Dominant = Dominant Dominant + Recessive = Dominant Recessive + Recessive = Recessive
