Some people can taste the bitter compound phenylthiocarbamide while others cannot. This trait isgoverned by a single autosomal gene; the allele fortasting is completely dominant with respect to the allele for nontasting. Among 1707 Hawaiians tested forthe ability to taste, 1326 tasters were found. Assumingthat the population is at Hardy-Weinberg equilibriumfor this gene and that mating is purely random:a. What are the allele frequencies for the tasting alleleT [= (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 nontasterfemale?f. What proportion of all of the progeny produced byall matings between a taster male and a nontasterfemale will be nontasters?g. Of all the matings in the population, what proportion will be between two tasters?
Evolutionary Genetics
Evolution is known as continuous changes that occur to adjust organisms in their changing environment over many generations. Various theories have been proposed to illustrate the origin of life and organic evolution. The most accepted one is the theory of natural selection by Charles Darwin. According to his postulate, organisms undergo a struggle for existence due to overproduction. To survive in nature, they acquire variations. The inheritable variations are selected by nature, and it leads to the survival of the fittest.
Phenotype Frequency
The majority of populations have a certain degree of variation in their genetic pools. Scientists can predict the genetic variation happening over time by measuring the amount of genetic variation in a population and these predictions assist them in gaining important insights into the processes that allow organisms to adapt to the environment or to develop into new species over generations. This process is referred to as the process of evolution.
Hardy Weinberg Equilibrium
The frequencies of allele and genotype were maintained constant from one generation to another due to the absence of other evolutionary forces. It is otherwise called the Hardy Weinberg principle the field of population genetics.
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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