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exam 1 2008 - Genetics 380 Test#1 NAME_KEY Section(or TA...

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Genetics 380 Test #1 NAME ___ KEY ____________________________________ Section (or TA): _______________________________ RUID: ______________________________ 447:380 Genetics October 8, 2009 Professor Maureen Barr EXAM 1: TEST# 1 General Instructions: There are 33 questions on this examination. Please be sure that you have the entire exam (9 pages). Fill in your name and recitation section number in the spaces provided. Questions 1-28 should be answered on the Scantron. On the Scantron form, fill in the correct box with a number two pencil. Include your name. In the box marked SUBJECT place your section number. In the box marked TEST NUMBER, place the exam version that you have (1, 2, or 3). Questions 27-33 should be answered on the exam. The points on this exam total 100. Upon completion, please turn in the exam. NOTE: This exam is designed to ascertain what you know about the material. Cheating will not be tolerated. Please keep your eyes on your own paper. Please keep your exam in front of your body, not off to the side. SOME USEFUL FORMULAS Name _______________________________ 1 X 2 = Σ (O-E) 2 /E Genetics 380 Test #1 PART I. MULITPLE CHOICE (2 pts each): Questions 1-28 should be answered on the Scantron. On the Scantron form, fill in the correct box with a number two pencil. Be sure to include your name, section number, and test number in the appropriate place. 1. A diploid somatic cell from a mouse 19 pairs of autosomes and one pair of sex chromosomes. As in humans, sex chromosomes determine sex: XX in females and XY in males. What is the total number of chromosomes and chromatids present in anaphase I? A. 20 chromosomes and 20 chromatids B. 20 chromosomes and 40 chromatids C. 40 chromosomes and 40 chromatids D. 40 chromosomes and 80 chromatids E. 80 chromosomes and 80 chromatids 2. Which of the following human genotypes is a male phenotypic sex?
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3. If adenine (A) makes up 23 percent of the bases in a certain DNA sample, what percentage of the bases must be cytosine (C)? 4. Which of the following statements about the forward genetics approach is FALSE?
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