MCB164+MT2+W03key

MCB164+MT2+W03key - Name_KEY_ MCB164 Winter 2003 Page 1 of...

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Name___________KEY____________________ MCB164 Winter 2003 Page of 6 ID #________________________________ SECOND MIDTERM March 3, 2003 Question Points Score 1 15 2 9 3 8 4 15 5 12 6 12 7 15 8 14 Total 100 A. This examination is closed book. B. There are 6 pages to the exam. Please count them before you start to make sure all are present . C. Please write your name on each page of the exam . D. Answer each question in the space provided. If additional space is required use the back of the page and indicate clearly that you continued your answer on the back. Do not attach additional pages. A. GOOD LUCK! Student authorization: I authorize the instructor to return the graded exam to me in the main office or to distribute it in the bin for me to pick up. Signature _____________________________ Date_____________________ 1
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MCB164 Winter 2003 Page of 6 1. (15 points) Match the following meiotic event with the appropriate stage of meiosis. (provide only one aswer for each event) A. Prophase I B. Metaphase I C. Anaphase I D. Prophase II E. Metaphase II F. Anaphase II ___ A __ Homologous chromosomes pair and undergo recombination ___ B ___ Cells can arrest at this stage for over 40 years in human females ___ C ___Sister chromatid cohesion between arm regions of chromosomes is lost ___ F ___ Sister chromatid cohesion between centromeric regions of chromosomes is lost ___ C ___ Centromeres from homologous chromosomes separate from one another 2. (9 points) Name three elements that are required to make a yeast artificial chromosome and briefly describe their functions. CEN (centromere) – segregation, the binding site for the kinetochore and thus the spindle ARS (autonomously replicating sequence) – origin of DNA replication in S-phase TEL (telomere) – required for maintenance of chromosome ends through DNA replication Yeast and bacterial markers are very very useful, but NOT strictly required, whereas CEN, ARS, and TEL are. 2
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MCB164+MT2+W03key - Name_KEY_ MCB164 Winter 2003 Page 1 of...

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