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MULTIPLE CHOICE QUESTIONS: (5 points each, 125 point total)
1. The hsr-omega gene is induced by heat stress and
is part of the conserved heat-shock response
system of Drosophila melanogaster. Previous
studies found two alleles, hsr-omegaa and hsr-
omegab, in the population. A more extensive
survey of several D. melanogaster populations
along Australian eastern seaboard yiel ded a result
shown on the right. Which of the following
statements is correct?
(A) There are more hsr-omrgaa allele in northern
Australia.
(B) This pattern suggests that that the hsr-omegaa
allele is adapted to a hot environment.
(C) This is an example of a cline.
(D) All of the above are correct.
(E) None of the above is correct.
2. Which of the following statements about HIV is correct?
(A) HIV is a virus containing RNA genomes. But it also uses DNA for p art of its life cycle.
(B) One of the factors contributing to HIV's success in developing resistance against anti-HIV drugs is
because of the high mutation rate resulting from the error-prone viral reverse transcriptase.
(C) One of the factors contributing to HIV's success in dev eloping resistance against anti-HIV drugs is
because of natural selection sorting through many variants existing in the HIV populations.
(D) All of the above
(E) None of the above
On the right are several phylogenetic trees. Please question 3 and 4.
3. Which of the following statements is co rrect?
(A) Trees I and II are the same.
(B) Trees I and III are the same.
(C) Trees I and IV are the same.
(D) All the trees are the same.
(E) All trees are different.
4. Focusing on Tree IV on the right, whic h of the
following statements is corr ect?
(A) Species E is evolved from species D.
(B) Species C is the common ancestor for
Species A and B.
(C) Species F is the common ancestor for all the
other species.
(D) All of the above
(E) None of the above
