Question Set 7 Ch. 15-17

  1. If the frequency of expression of a recessive trait in a population is 16 percent, the frequency of the recessive allele in that population would be

    2. (A) 16 percent
    (B) 25 percent
    (C) 40 percent
    (D) 50 percent
    Answer

  2. The Hardy-Weinberg rule is

    3. (A) useful in monitoring evolution in a sexually reproducing population.
    (B) used to predict when genetic drift will occur in a sexually reproducing population
    (C) useful in determining if polyploidy occurs in specific plant populations.
    (D) used to predict when specific groups of organisms will become extinct.
    Answer

  3. New alleles arise by

    4. (A) mutation
    (B) migration
    (C) genetic drift
    (D) matings
    Answer

  4. In an unchanging environment, selection in a well-adapted population is

    5. (A) directional
    (B) disruptive
    (C) stabilizing
    (D) absent
    Answer

  5. How does an insect population develop resistance to a pesticide?

    6. (A) The insects developed that resistance in response to the pesticide.
    (B) Some of their genes mutated when exposed to the pesticide.
    (C) The insects inherited genes that made them resistant to the pesticide.
    (D) None of these answers are correct.
    Answer

  6. Two individuals are members of the same species if they

    7. (A) possess the same number of chromosomes
    (B) breed at the same time.
    (C) are phenotypically indistinguishable.
    (D) mate and produce fertile offspring.
    Answer

  7. Which of the following includes the others?

    8. (A) family
    (B) phylum
    (C) species
    (D) order
    Answer

  8. Convergence in external morphology of sharks, penguins, and porpoises is attributed to

    9. (A) reduced genetic variability in these groups.
    (B) selection pressures that are common to each group.
    (C) reproductive isolation of these groups.
    (D) identical genes in all three groups.
    Answer

  9. Stanley Miller's experiment to study the early synthesis of organic compounds included starting with all the following molecules except

    10. (A) methane
    (B) ammonia
    (C) water
    (D) oxygen
    Answer

  10. The earliest organisms were probably unicellular

    11. (A) autotrophs
    (B) aerobes
    (C) heterotrophs
    (D) eukaryotes
    Answer

  11. Remove the RNA from a retrovirus particle and what is left?

    12. (A) DNA
    (B) protein
    (C) purine
    (D) nothing
    Answer