Ap Bio Unit 2 Review Study Guide Questions And Correct Answers

Brightly colored peacocks mate more frequently than do drab peacocks. {Ans: sexual selection}A characteristic of allopatric speciation is {Ans: geographic isolation}In a Hardy-Weinberg population with two alleles, A and a, if the frequency of the allele a is 0.4. What is the percentage of the population that is homozygous for this allele? {Ans: 16}What is a characteristic of archaebacteria? {Ans: They thrive in extreme environments.}What would be the best technique for determining the phylogenetic relationship among several closely related species? {Ans: DNA analysis and protein comparison}Which of the following is NOT a requirement for the maintenance of Hardy-Weinberg equilibrium? {Ans: an increasing mutation rate}In a certain flock of sheep, 4% of the population has black wool and 96% has white wool. Assume that the population is in Hardy-Weinberg equilibrium. If black wool is a recessive trait, what percentage of the population is heterozygous for this trait? {Ans: 32%}What is binomial nomenclature? {Ans: A naming system in which each organism is given a two-part name}Fossil evidence indicates that horses have gradually increased in size over geological time. {Ans: directional selection}Several closely related frog species of the genus Rana are found in the