Bio280 Exam 2 Questions and Answers

Which novel human activity encouraged the early increase of malaria? Answer agriculture Genetic drift is the process responsible for: Answer Losing an existing allele due to random sampling The high incidence of migraine headaches in residents of Norfolk Island (who were moved there from Pitcairn Island) is a result of: Answer Genetic drift associated with a founder effect set in motion by the events of the Bounty Mutiny Under which conditions is selection most likely to be masked by genetic drift Answer in small populations Which of the following accurately describes results obtained in examining the evolution of Culex pipiens populations in France that were responding to pesticide treatment. Answer The mosquito populations at the coast evolved resistance, but the initial mutation had a cost and did not spread inland Based on the results of the observations of the R. Lenski lab on E. coli, which of the following evolutionary processes has been documented to occur experimentally Answer all of the following: mutation, selection, genotypic change, phenotypic change The conditions for the long running experiment carried out by the Lenski lab to assess evolution in the bacterium E. coli involved: Answer providing only a limited supply of glucose Results of simulation studies show that: Answer dominant allele frequency rises more rapidly compared to recessive alleles, but dominant alleles are less likely to become fixed in a population