Genetics: From Genes to Genomes
6th Edition
ISBN: 9781259700903
Author: Leland Hartwell Dr., Michael L. Goldberg Professor Dr., Janice Fischer, Leroy Hood Dr.
Publisher: McGraw-Hill Education
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Chapter 21, Problem 16P
Some people can taste the bitter compound phenylthiocarbamide while others cannot. This trait is governed by a single autosomal gene; the allele for tasting is completely dominant with respect to the allele for nontasting. Among 1707 Hawaiians tested for the ability to taste, 1326 tasters were found. Assuming that the population is at Hardy-Weinberg equilibrium for this gene and that mating is purely random:
| a. | What are the allele frequencies for the tasting allele T [= (p)] and for the nontasting allele t [= (q)]? |
| b. | What are the genotype frequencies in the population? |
| c. | Of all the matings in the population, what proportion will be between two nontasters? |
| d. | Of all the matings in the population, what proportion will be between a taster and a nontaster? |
| e. | Of all the matings in the population, what proportion will be between a taster male and a nontaster female? |
| f. | What proportion of all of the progeny produced by all matings between a taster male and a nontaster female will be nontasters? |
| g. | Of all the matings in the population, what proportion will be between two tasters? |
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Chapter 21 Solutions
Genetics: From Genes to Genomes
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