Multiple Choice
Hair color is influenced by the amount, size, and distribution of which of the following?
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22. Evolution of Populations
Genetics and Allele Frequencies
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The number of individuals in a population with each of the following genotypes is listed below. What is the frequency of the small t allele?
TT: 640
Tt: 200
tt: 160
A
0.32
B
0.16
C
0.26
D
0.52
Verified step by step guidance1
First, understand that the frequency of an allele in a population can be calculated using the Hardy-Weinberg principle. This involves determining the total number of alleles and then finding the proportion of the allele of interest.
Calculate the total number of individuals in the population by adding the number of individuals with each genotype: TT, Tt, and tt. This is given by: 640 + 200 + 160.
Determine the total number of alleles in the population. Since each individual has two alleles, multiply the total number of individuals by 2.
Identify the number of small t alleles. Individuals with the tt genotype contribute two small t alleles each, and individuals with the Tt genotype contribute one small t allele each. Calculate the total number of small t alleles using: (2 * number of tt individuals) + (1 * number of Tt individuals).
Finally, calculate the frequency of the small t allele by dividing the total number of small t alleles by the total number of alleles in the population. This will give you the frequency of the small t allele.
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