Midterm 1 + answers - NAME_STUDENT NUMBER Biology 2C03 Term...

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NAME_____________________________________STUDENT NUMBER_________________________ 1 Biology 2C03 Term Test 1 Instructors: Dr. Sara Seabrooke Date: October 21, 2011 Time: 50 minutes Instructions: 1) This midterm test consists of 8 pages. Please ensure that all pages are present. 2) Print your name and student number at the top of each page. Also, print your name and student number on the scantron card. 3) There are 15 multiple-choice questions (1 mark each). Please use the computer card to record your multiple-choice answers. Any answers not indicated on the scantron card will not be graded. (15 marks total) 4) There are 6 short-answer questions. Please answer these questions in the allotted space on this midterm. (15 marks total) 5) The final grade is out of 30 marks. 6) The test is 50 minutes long. 7) Please hand in the test package and the scantron card at the end of the test. Removal of tests is considered academic dishonesty. Good luck!! Grade: MCQ : /15 SA: /15 Final: /30
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NAME_____________________________________STUDENT NUMBER_________________________ 2 Part A. 15 Multiple Choice Questions: 1 Mark each. Choose the best answer and fill in the associated bubble on the scantron card. 1. Multi-factorial traits are influenced by _______ and ________. a. dominance; codominance b. epistasis; temperature c. age; sex d. increased expressivity; reduced penetrance e. polygenes; environment 2. There are two protein variants produced by individuals with or without the symptoms of sickle cell disease. One variant migrates slowly and the other migrates quickly. Genotype: HbS / HbS , phenotype = one slow band Genotype: HbA / HbS , phenotype = two bands, one fast and one slow Genotype: HbA / HbA , phenotype = one fast band If you are describing the relationship between the alleles based upon this phenotype, you would probably say that: a) HbA is dominant to HbS b) HbS is dominant to HbA c) the alleles are codominant d) the alleles show incomplete dominance 3. You are studying two strains from a certain species of tomato plants. In a wild strain of tomato plants you measure the weight of fruits and find that the phenotypic variance, VP = 3.2 g2. In another strain of highly inbred tomato plants, VP = 2.2 g2. What are VG and VE in the inbred strain? a) VG = 0 g2 ; VE = 2.2 g2 b) VG = 0 g2 ; VE = 1 g2 c) VG = 0 g2 ; VE = 3.2 g2 d) VG = 1 g2 ; VE = 2.2 g2 e) VG = 1 g2 ; VE = 3.2 g2 4. A cross that distinguishes the genotype of one of the parents is called a: a) Complementation test b) Testcross c) Dihybrid cross d) Monohybrid cross e) Epistasis
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NAME_____________________________________STUDENT NUMBER_________________________ 3 5. What type of natural selection is acting on sickle cell disease in areas where malaria is present? a)
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Midterm 1 + answers - NAME_STUDENT NUMBER Biology 2C03 Term...

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