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Exam 1 (2007) - Biol 3301 Exam#1 September 20th 2007 There...

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Biol 3301 Exam #1 September 20 th , 2007 There are a total of 12 pages in this exam. This exam consists of 33 questions worth a total of 100 points. All questions are multiple choice and there is one best answer for each question. Record your answers on the scantron sheet, and answer only once for each question or you will be automatically marked wrong. Use a #2 pencil. Name_________________________ ID#__________________________
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1. Which of the following is not a trait of a Good Genetic Model System a. fast generation time b. has many redundant gene families c. inexpensive to culture d. Facile manipulation of genome e. has a large collection of mutants 2. A phenotype is 3. Variability in phenotype can be caused by 4. In Meiosis, the stages of Prophase I are: Question 5-7: Drosophila melanogaster have four pairs of chromosomes. 5. What is the ploidy level at Metaphase II of meiosis? a. 8n b. 1n c. 4n d. 2n e. 0n 6. How many chromatids are present per cell at Telophase I of meiosis? 7. What is the ploidy level at Prophase of Mitosis?
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Questions 8-11: You have performed the following trihybrid test cross in maize with the colorless (c), waxy (wx) and shrunken (sh) loci. You need to figure out the map order and distance between the loci. Cc Wxwx Shsh X cc wxwx shsh (tester) Colored, Starchy, Plump colorless, waxy, shrunken You record the following progeny: Trihybrid Gamete Phenotype of Progeny # of Progeny C Wx Sh Colored, Starchy, Plump 4 c wx sh colorless, waxy, shrunken 2 c wx Sh colorless, waxy, Plump 2708 C Wx sh Colored, Starchy, shrunken 2538 c Wx Sh colorless, Starchy, Plump 626 C wx sh Colored, waxy, shrunken 601 c Wx sh colorless, Starchy, shrunken 116 C Wx Sh Colored, waxy, Plump 113 Total 6708
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