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3 Written questions

3 Matching questions

  1. in certain native american groups, albinism due to a homozygous recessive condition in the biochemical pathway for melanin is sometimes seen. if the frequency of the allele for this condition is 0.06, which of the following is closest to the frequency of the dominant allele in this population? (assume the population is in HW equilibrium)
    A. 0.04
    B. 0.06
    C. 0.16
    D. 0.36
    E. 0.94
  2. in certain species crosses, such as that between the horse and the donkey, offspring are produced but usually sterile. the most common explanation of this result is that
    A. the chromosomes of the two species differ too much to pair properly in meiosis
    B. the two species differ too much in behavior to be able to mate successfully
    C. embryological development in the two species are incompatible
    D. hormonal differences between the two species prevent proper development of the sex gametes
  3. the embryonic development of vertebrates provides evidence for evolution because
    A. each organism passes through the entire evolutionary history of its species as it develops from a fertilized egg to a full grown individual
    B. the more recently species have shared a common ancestor, the more similar their embryological development
    C. a small number of mutations can convert the embryo of one species into another species
    D. the dna sequences of embryos change as they develop
  1. a E
  2. b B
  3. c A

5 Multiple choice questions

  1. C
  2. D
  3. E
  4. D
  5. B

5 True/False questions

  1. for some traits such as birth weight, natural selection favors individuals that are average and the extremes are selected against this is known as:
    A. diversifying selection
    B. directional selection
    C. adaptive radiation
    D. disruptive selection
    E. stabilizing selection


  2. the banding patterns of viceroy butterflies is an example of:
    A. mimicry
    B. homology
    C. polymorphism
    D. mutualism
    E. commensalism


  3. greatest diversity of species
    A. tropical rain forest
    B. taiga
    C. arctic tundra
    D. temperate grassland
    E. desert


  4. How does natural selection affect the frequency of mutations?
    A. under conditions of high selection pressure, beneficial mutations occur more frequently.
    B. natural selection doesnt affect the frequency of mutations
    C. all mutations increase when selection pressure is high
    D. when there is no selection pressure, mutations do not occur
    E. mutations occur less frequently when selection pressure is high


  5. if a population that contains 16% homozygous recessive individuals(blue eyes)and 84% individuals with brown eyes (homozygous dominant and heterozygotes), what is the frequency of the dominant allele in the population?
    A. 0.6
    B. 0.4
    C. 0.32
    D. 0.64
    E. 0.8