1 Review Alleles Genotype Phenotype = specific form of gene (ex. A or a, p or q) = collection of genes (ex. AA, pp, pq) = expression of genotype (ex. flower color) Problem 1: Genotype Frequencies • The proportion of each genotype in a population Given alleles A and a, with N as the pop. size, then: Frequency of genotype AA = NAA / N Frequency of genotype Aa = NAa / N Frequency of genotype aa = Naa / N Why are we doing this???? ! Genotype frequencies allow us to detect evolutionary change Calculate the gentotype frequencies for a population of 200, with NAA = 80, NAa = 50, and Naa = 70.2 Problem 1: Genotype Frequencies Frequency of genotype AA = NAA / N Frequency of genotype Aa = NAa / N Frequency of genotype aa = Naa / N Calculate the gentotype frequencies for a population of 200, with NAA = 80, NAa = 50, and Naa = 70. What is the frequency of the AA genotype? a. 0.25 b. 0.3 c. 0.35 d. 0.4 Problem 1: Genotype Frequencies Frequency of genotype AA = NAA / N Frequency of genotype Aa = NAa / N Frequency of genotype aa = Naa / N Calculate the gentotype frequencies for a population of 200, with NAA = 80, NAa = 50, and Naa = 70. What is the frequency of the AA genotype? a. 0.25 b. 0.3 c. 0.35 d. 0.4 Problem 1: Genotype Frequencies Frequency of genotype AA = NAA / N Frequency of genotype Aa = NAa / N Frequency of genotype aa = Naa / N Calculate the gentotype frequencies for a population of 200, with NAA = 80, NAa = 50, and Naa = 70. What is the frequency of the AA genotype? a. 0.25 b. 0.3 c. 0.35 d. 0.4 ! NAA / N = 80 / 200 = 0.4 Problem 1: Genotype Frequencies Frequency of genotype AA = NAA / N Frequency of genotype Aa = NAa / N Frequency of genotype aa = Naa / N Calculate the gentotype frequencies for a population of 200, with NAA = 80, NAa = 50, and Naa = 70. What is the frequency of the Aa genotype? a. 0.25 b. 0.3 c. 0.35 d. 0.43 Problem 1: Genotype Frequencies Frequency of genotype AA = NAA / N Frequency of genotype Aa = NAa / N Frequency of genotype aa = Naa / N Calculate the gentotype frequencies for a population of 200, with NAA = 80, NAa = 50, and Naa = 70. What is the frequency of the Aa genotype? a. 0.25 b. 0.3 c. 0.35 d. 0.4 Problem 1: Genotype Frequencies Frequency of genotype AA = NAA / N Frequency of genotype Aa = NAa / N Frequency of genotype aa = Naa / N Calculate the gentotype frequencies for a population of 200, with NAA = 80, NAa = 50, and Naa = 70. What is the frequency of the Aa genotype? a. 0.25 ! NAa / N = 50 / 200 = 0.25 b. 0.3 c. 0.35 d. 0.4 Problem 1: Genotype Frequencies Frequency of genotype AA = NAA / N Frequency of genotype Aa = NAa / N Frequency of genotype aa = Naa / N Calculate the gentotype frequencies for a population of 200, with NAA = 80, NAa = 50, and Naa = 70. What is the frequency of the aa genotype? a. 0.25 b. 0.3 c. 0.35 d. 0.4 Problem 1: Genotype Frequencies Frequency of genotype AA = NAA / N Frequency of genotype Aa = NAa / N Frequency of genotype aa = Naa / N Calculate the gentotype frequencies for a population of 200, with NAA = 80, NAa = 50, and Naa = 70. What is the frequency of the aa genotype? a. 0.25 b. 0.3 c. 0.35 d. 0.44 Problem 1: Genotype Frequencies Frequency of genotype AA = NAA / N Frequency of genotype Aa = NAa / N Frequency of genotype aa = Naa / N Calculate the gentotype frequencies for a population of 200, with NAA = 80, NAa = 50, and Naa = 70. What is the frequency of the aa genotype? a. 0.25 b. 0.3 c. 0.35 ! Naa / N = 70 / 200 = 0.35 d. 0.4 Problem 2: Allele Frequencies • The proportion of each allele in a population Given alleles A and a, with N as the pop. size, then: Frequency of allele A = p = (2NAA + NAa) / 2N Frequency of allele a = q = (2Naa + NAa) / 2N Calculate the alelle frequencies for a population of 200, with NAA = 45, NAa = 130, and Naa = 25. Problem 2: Allele Frequencies Frequency of allele A = p = (2NAA + NAa) / 2N Frequency of allele a = q = (2Naa + NAa) / 2N Calculate the alelle frequencies for a population of 200, with NAA = 45, NAa = 130, and Naa = 25. What is the frequency of the A allele? a. 0.55 b. 1.05 c. 0.825 d. 0.45 Problem 2: Allele Frequencies Frequency of allele A = p = (2NAA + NAa) / 2N Frequency of allele a = q = (2Naa + NAa) / 2N Calculate the alelle frequencies for a population of 200, with NAA = 45, NAa = 130, and Naa = 25. What is the frequency of the A allele? a. 0.55 b. 1.05 c. 0.825 d. 0.455 Problem 2: Allele Frequencies Frequency of allele A = p = (2NAA + NAa) / 2N Frequency of allele a = q = (2Naa + NAa) / 2N Calculate the alelle frequencies for a population of 200, with NAA = 45, NAa = 130, and Naa = 25. What is the frequency of the A allele? a. 0.55 = p = (2*45 + 130) / (2*200) b. 1.05 c. 0.825 d. 0.45 Problem 2: Allele Frequencies Frequency of allele A = p = (2NAA + NAa) / 2N Frequency of allele a = q = (2Naa + NAa) / 2N Calculate the alelle frequencies for a population of 200, with NAA = 45, NAa = 130, and Naa = 25. What is the frequency of the a allele? a. 0.775 b. 0.55 c. 0.3875 d. 0.45 Problem 2: Allele Frequencies Frequency of allele A = p = (2NAA + NAa) / 2N Frequency of allele a = q = (2Naa + NAa) / 2N Calculate the alelle frequencies for a population of 200, with NAA = 45, NAa = 130, and Naa = 25. What is the frequency of the a allele? a. 0.775 b. 0.55 c. 0.3875 d. 0.45 Problem 2: Allele Frequencies Frequency of allele A = p = (2NAA + NAa) / 2N Frequency of allele a = q = (2Naa + NAa) / 2N Calculate the alelle frequencies for a population of 200, with NAA = 45, NAa = 130, and Naa = 25. What is the frequency of the a allele? a. 0.775 b. 0.55 c. 0.3875 d. 0.45 = q = (2*25 + 130) / (2*200)6 TO DETERMINE IF EVOLUTION IS ACTIVELY OCCURRING IN A POPULATION. …
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