Answers: Hardy-Weinberg Problems

 

1.       Allele frequencies: p=0.427 and q=0.573

          Expected # people: AA=91; Aa=245; aa=164

 

2.       Observed genotype frequencies: MM: 0.73; MN: 0.20; NN: 0.07

          Allele frequencies: p=0.83 and q=0.17

          Expected genotype frequencies: MM: 0.69; MN: 0.28; NN: 0.03

          Expected # of people: MM=690; MN=280; NN=30

          Is pop. in H-W Equilibrium? No. A chi-square test would reveal significance at the 0.05 level.

 

3.       Allele frequencies for original population: p=0.50 and q=0.50

          Expected genotype frequencies for original population: PP=0.25, Pp=0.50, pp=0.25

          Allele frequencies for new population: p=0.37 and q=0.63

          Expected genotype frequencies for new population: PP=0.137, Pp=0.466, pp=0.397

 

4.       Allele frequencies have changed from: p=0.68 to 0.84 and q=0.32 to 0.16

          Genotype frequencies have changed from: EE=0.46 to 0.71; Ee=0.44 to 0.27; ee=0.10 to 0.025

          Allele frequencies for stranded population: p=0.37 and q=0.63

          Genotype frequencies for stranded population: EE=0.14; Ee=0.47; ee=0.40

          Which evolutionary mechanism is this?  Genetic drift (founder effect)