Exam 4 Practice
1. (4) Explain the difference between Incomplete and Co-dominance?
2. The gentleman who proposed the meiotic divisions was
A. Wallace, W.
C. Sutton, W.
B. Boveri, T.
D. Weismann, A.
3. (4) Explain the difference between pleitrophy and epistasis?
4. When Morgan crossed his wild type female with a white eyed male, the F2 result of only white
eyed male Drosophila led to the discovery of
A. crossing over of chromosomes.
B. sex-linked genes.
C. mutations.
D. beer swilling flies.
5. When Morgan did his dihybrid crosses for body color and wing length the results showed
A. mostly parental and some recombinant offspring of the F1 generation.
B. only recombinant offspring of the F1 generation.
C. only parental offspring of the F1 generation.
D. true Mendelian results of the F1 generation.
6. Morgan’s results of his dihybrid cross are most probably due to
A. crossing over of chromosomes.
C. mutations.
B. sex-linked genes.
D. beer swilling flies.
7. (3) What is the basis for Sturtevant's theories of gene mapping?
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8. Most abnormal meiotic divisions are linked to
A. deletions.
C. inversions.
B. duplications.
D. non-disjunctions.
9. Answer the questions below based on the information presented in this pedigree.
Cystic fibrosis is an inherited disease caused by the production of a faulty membrane transporter
for Cl-, which prevents cells from transporting Cl- out of the cell into extracellular mucus. The disease
can be recognized by the production of thick mucus that affects the air passageways of the lungs and
the secretory ducts of the liver and pancreas. The pattern for inheritance of this disease is shown in
the pedigree below (square = male, circle = female, open = w/o disease, solid = w/disease):
(6) Use the above information to answer the following questions.
A. Is cystic fibrosis inherited as a dominant or recessive trait? Explain.
B. What is the genotype expected for the individual with cystic fibrosis? Explain.
C. What is the probable genotype of the affected individual's parents? Explain.
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10. The scientist(s) that transformed bacteria and pointed to the existence of DNA is/was
A. Delbruck, Hershey, & Chase.
B. Chargaff.
C. Griffith.
D. Pauling.
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11. (4) Cite two significant contributions made by R. Franklin to the discovery of the structure of
DNA?
12. Synthesis of new DNA strands occurs in a
A. semi-conservative process.
C. continuous and semi-continuous process.
B. bi-directional process.
D. all the above.
13. Matching bases and reading the primer is the responsibility of
A. DNA ligase.
C. DNA polymerase III.
B. DNA polymerase I.
D. DNA helicase.
14. The enzyme responsible for reading and editing DNA is
A. DNA ligase.
C. RNA polymerase.
B. DNA polymerase I.
D. DNA helicase.
15. (6) Show by arrows and numbers the direction of the replication process for each side of this DNA
replication bubble? Explain your reasoning.
16. If the sequence to be copied on DNA is 3’ATCGTA5’, the replicated strand would be
A. 5’TAGCTA3’.
B. 5’TAGCAT3’.
C. 3’TACGAT5’.
D. 5’UTGCAU3’.
17. The energy required for DNA replication comes directly from
A. ATP.
C. the electron transport chain.
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B. glycolysis.
D. the bases of DNA.
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18. (6) Describe the process and name the key players in the repair of DNA?
19. The portions of DNA that do not code (nonsense information) for product are called
A. introns.
B. exons.
C. chevrons.
D. worthless.
20. (3) Explain the significance of the enzyme DNA telomerase?
21. RNA polymerase binds to DNA at promoter sites which have repeating sequences like
A. AATAAA.
B. CATCAT.
C. TATATA.
D. UAUAUA.
22. Which of the following triplets is not a stop codon?
A. UAA
C. AUG
B. UAG
D. UGA
23. During the process of elongation the first amino acid will always have its ? free.
A. carboxyl end
B. core carbon
C. amino end
D. derriere end
24. The investigator that came up with the idea of uniformitarianism to explain the
geological record was
A. Darwin.
B. Malthus.
C. Hutton.
D. Lyell.
25. (3) Explain the principle behind using radioisotopes to age fossils?
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26. The data the Darwinists claim that provides the best evidence for evolution is the
A. fossil record.
B. taxonomic data.
C. molecular data.
D. all the above.
27. Analogous structures are said to have a different structure but the same
A. size.
B. function.
C. name.
D. location.
28. (3) Describe how a mechanical pre-zygotic barrier prevents speciation?
29. (3) Describe what is meant by the phrase “That union will not produce viable offspring”?
30. The mode of speciation which occurs because of some huge geological disaster is called
a/an
A. parapatric mode.
B. sympatric mode.
C. allopatric mode.
D. pie-ala mode.
31. (4) Describe two naturally occurring causes of extinction of a species?
32. A population is defined as ? living in the same place
A. a bunch of organisms
C. the same species
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B. humans
D. whiney men
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33. (4) Define a mutation and explain how they can cause a population to change?
34. Immigration and emigration can cause ? effects.
A. genetic drift
C. mutations
B. gene flow
D. bottle neck
35. (4) Explain how stabilizing effects can change population dynamics?
36. (4) Explain the principles that support the idea of a mosaic form of population
evolution?
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Review your previous exams for the comprehensive portion of the final, paying particular
attention to the highlighted or missed most often question from each of the previous
exams.
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