.11 Sprint Microsoft Corporation Evolation Homework 4 1. If the dominant trait f

Question

.11 Sprint Microsoft Corporation Evolation Homework 4 1. If the dominant trait for being able to taste the chemical PTC (phenylthiocarbamidc) i present in 60% of the population, what is the frequency of the recessive ALLELE nontaster) in the population. What percent of the populaion are sontasters. 2. what Consider a stable population in which the recessive allele has a frequency of 0 percent of the population would be hetcrryous 3. what are In a stable population, 91% o(the ndiv duals express the dominant phenotype the allele frequencics foe the dominant and recessive alleles? What pcrcent of individuals expressing the dominant phenotype are homozypoust (ncad this question carcfully 4. In a populatioe of $00 individuals, 200 are genotype AA, 125 are genotype Aa, and 175 ae gmotype aa What is the frequency of the dominant allcle A? What is the froquency of the recessive allele a? Given hese allele frequencies, what does Hardy-Weinberg prodict will be the frequencies of cach of the three genotypest Is the population in Hardy-Weinberg equilbrium? Fully explain your answer

Explanation / Answer

Answer:

1)

2)

3)

Percentage of individuals expressing the dominant phenotype are homozygous can be determined as:

4)

Observed frequencies:

Hardy Weinberg Expected and observed frequencies of each of three genotypes:

Since observed frequencies deviate significantly from expected frequencies, therefore, given population is not in Hardy Weinberg equilibrium.

Chi Square test:

X2 = 124.37

Expected Observed AA 0.2756 0.4000 Aa 0.4988 0.2500 aa 0.2256 0.3500

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