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5 Written questions

4 Matching questions

  1. which of the following is probably the best explanation for the fact that Antarctic penguins cant fly, although there is evidence that millions of years ago their ancestors could do so?
    A. penguins live on land and feed in the water, therefore they have no need to fly
    B. the antarctic home of penguins is flat and barren, so there's no place to fly
    C. ancestral penguins without large wings were better able to swim and feed in water, so they passed their genes for shorter wing structure to their offspring
    D. ancestral penguins didnt use their wings for long periods of time, so todays penguins have tiny nonfunctional wings
  2. A LARGE POPULATION OF LAB AANIMALS HAS BEEN ALLOWED TO BREED RANDOMLY FOR A NUMBER OF GENERATIONS. AFTER SEVERAL GENERATIONS, 49% OF THE ANIMALS DISPLAY A RECESSIVE TRAIT aa THE SAME PERCENTAGE AS AT THE BEGGINING OF THE BREEDING PROGRAM. THE REST OF THE ANIMALS SHOW THE DOMINANT PHENOTYPE, WITH HETEROZYGOTES INDISTINGUISHABLE FROM THE HOMOZYGOUS DOMINANTS.
    what proportion of the population is probably heterozygous Aa for this trait?
    A. o.07
    B. 0.42
    C. 0.51
    D. 0.09
    E. 0.21
  3. 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
  4. the establishment of a genetically unique population through genetic drift
    A. founder effect
    B. kin selection
    C. competitive exclusion
    D. adaptive radiation
    E. convergent evolution
  1. a C
  2. b B
  3. c A
  4. d E

5 Multiple choice questions

  1. A
  2. D
  3. A
  4. C
  5. D

5 True/False questions

  1. If a population is ini Hardy Weinberg equilibrium then:
    A. it is evolving to adapt to environmental changes
    B. the frequency of alleles is changing with each generation
    C. mutations, immigration, and selective mating are changing allele frequencies
    D. it is not evolving and allele frequencies remain the same with each generation
    E. Homozygous recessive individuals are less fit.
    D

          

  2. assuming that the population was in HWE for the g locus, what was the frequency of allele g in the moths that emerged in 1980?
    A. 0.33
    B. 0.50
    C. 0.67
    D. 0.75
    E. 1.00
    D

          

  3. the wing of a bat, the flipper of a whale, and the forelimb of a horse appear very different, yet detailed studies reveal the presence of the same basic bone pattern. these structures are examples of
    A. analogous structures
    B. homologous structures
    C. vestigial structures
    D. balanced polymorphism
    E. convergent evolution
    E

          

  4. which of the following is the most likely reason for the observed differences in the frequency of the g allele between 1965 and 1972
    A. emigration of white moths from the population
    B. chance
    C. selection against the gray phenotype
    D. speciation
    E. mutation
    A

          

  5. the appearance of a fertile, polyploidy individual within a population of diploid organisms is a possible source of a new species. if this individual is capable of reproducing to form a new population. scientists would consider this to be an example of:
    A. allopatric speciation
    B. sympatric speciation
    C. polygenic speciation
    D. genetic drift
    E. hardy weinberg equilibrium
    B

          

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