To calculate the phenotype frequency, you need to consider the genotype frequencies and the relationship between genotype and phenotype. 1. Determine the genotype frequencies: - For the genotype "Typica" (Tt), the frequency is 2pq, where p is the frequency of the dominant allele (T) and q is the frequency of the recessive allele (t). - For the genotype "Carbonaria" (TT), the frequency is p2, where p is the frequency of the dominant allele (T). 2. Calculate the phenotype frequencies: - For the phenotype "Light" (Typica), the frequency is the sum of the frequencies of the genotypes Tt and tt. - For the phenotype "Dark" (Carbonaria), the frequency is the frequency of the genotype TT. Note: The frequency of the recessive allele (q) can be calculated as the square root of the frequency of the recessive genotype (tt). Example calculation: Given the following genotype frequencies: - Tt (Typica): 0.49 - TT (Carbonaria): 0.09 1. Calculate the frequency of the recessive allele (q): - q = √(frequency of tt) = √(0.49) = 0.7 2. Calculate the phenotype frequencies: - Frequency of "Light" (Typica) = 2pq + q2 = 2(0.7)(0.3) + (0.3)^2 = 0.42 + 0.09 = 0.51 - Frequency of "Dark" (Carbonaria) = p2 = (0.3)^2 = 0.09 Therefore, the phenotype frequencies are: - "Light" (Typica): 0.51 - "Dark" (Carbonaria): 0.09

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