The ability to taste PTC (phenylthiocarbamide) depends on the presence of a dominant gene T; nontasters are

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The ability to taste PTC (phenylthiocarbamide) depends on the presence of a dominant gene T; nontasters are homozygous for the recessive gene t. This is a situation of classical dominant-recessive inheritance.

(a) Consider a mating between heterozygous parents producing three offspring. What proportion of the offspring are likely to be tasters? What is the chance that all three offspring will be tasters? Nontasters? What is the chance that two will be tasters and one will be a nontaster?

(b) Consider a mating between Tt and tt parents. What is the anticipated percentage of tasters? Nontasters? What proportion can be expected to be homozygous recessive? Heterozygous? Homozygous dominant?

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Human Anatomy and Physiology

ISBN: 978-0321927040

10th edition

Authors: Elaine N. Marieb, Katja Hoehn

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