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4 Written questions

4 Matching questions

  1. 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
  2. DNA sequences can be used to determine the evolutionary relationships of species because
    A. organisms with similar anatomy will develop similar dna sequences by convergent mutations
    B. dna sequences for proteins never change, so two species that have the same protein will have hte same dna sequences
    C. natural selection causes organisms that live in similar environmental conditions to have the same mutations in their dna sequences
    D. mutations occur randomly in dna at a steady rate, so the number of dna difference is equivalent to the time since a pair of species that shared a common ancestor
  3. IN A CERTAIN FLOCK OF SHEEP, 4% OF THE POPULATION HAS BLACK WOOL AND 96% HAS WHITE WOOL. ASSUME THE POPULATION IS IN HW EQUILIBRIUM
    if black wool is a recessive trait, what percentage of the population is heterozygous for this trait?
    A. 4%
    B. 20%
    C. 32%
    D. 64%
    E. 80%
  4. 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
  1. a C
  2. b B
  3. c A
  4. d D

5 Multiple choice questions

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

5 True/False questions

  1. over ten inches of precipitation per year. long cold winters and short summers. dominant vegetation is gymnosperm
    A. tropical rain forest
    B. taiga
    C. arctic tundra
    D. temperate grassland
    E. desert
    A

          

  2. For a population in Hardy-Weinberg equilibrium, the frequency of the recessive allele:
    A. increases with each generation until it reaches 50%
    B. decreases each generation until it reaches 25%
    C. remains the same in every generation.
    D. decreases due to negative selection pressure on homozygous recessive individuals.
    E. increases due to the occurence of new mutations
    E

          

  3. IN A CERTAIN FLOCK OF SHEEP, 4% OF THE POPULATION HAS BLACK WOOL AND 96% HAS WHITE WOOL. ASSUME THE POPULATION IS IN HW EQUILIBRIUM
    what percentage of the population is homozygous for white wool?
    A. 20%
    B. 40%
    C. 64%
    D. 80%
    E. 96%
    C

          

  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
    A

          

  5. 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
    C