Genetics Exam Pt 2

Jessica Bastos ANTH 301 LAB 1. What is the formula used in the Hardy-Weinberg Model for population genetics? (4 points) p 2 + 2pq + q 2 = 1 2. In a population of 200 individuals, 70 are homozygous dominant, 100 are heterozygous, and 30 are homozygous recessive for the recessive trait of sickle cell anemia. a) Complete the following chart for the population. (6 points) Number of Individuals Number of S alleles Number of s alleles SS 70 140 0 Ss 100 100 100 ss 30 0 60 Total 200 240 160 b) How many individuals are affected with sickle cell anemia? (2 points) The number of individuals affected by sickle cell anemia is 30 c) Calculate p and q for this population. (6 points) p = ___ 0.6 ___ q = ___ 0.4 ___ d) Calculate the H-W formula (6 points) p 2 + 2pq + q 2 = 1 (0.6) 2 + 2(0.6)(0.4) + (0.4) 2 0.36 + 0.48 + 0.16 = 1 e) State the values for the following chart. (6 points) Expected Frequency Observed Frequency SS 0.35 0.36 Ss 0.5 0.48 ss 0.15 0.16

Jessica Bastos ANTH 301 LAB