Test 2 - answer key - NAME_STUDENT NUMBER Biology 2C03 Term...

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NAME: ___________________STUDENT NUMBER:_____________________ Biology 2CO3: Genetics Winter 2010 Page 1 of 10 Biology 2C03 Term Test #2 Instructors: Dr. Kimberley Dej Date: Monday March 15, 2011 Time: 10:30 am to 11:20 am Instructions: 1) This midterm test consists of 10 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 25 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. (25 marks total) 4) There are 2 short-answer questions. Please answer these questions in the allotted space on this quiz. (20 marks total). 5) The final grade is out of 45 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 : /25 SA: /20 Final: /45
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NAME: ___________________STUDENT NUMBER:_____________________ Biology 2CO3: Genetics Winter 2010 Page 2 of 10 Part A. 25 Multiple-choice questions: 1 mark each. Please indicate your answers on the scantron card. 1. Normally the domestic cat (a mammal) has a diploid number of 2n = 38. How many chromosomes would you see in a gamete from a male cat? a) 2 b) 18 c) 19 d) 36 e) 38 2. In the following figure of a single cell in meiosis, how many of the final four gametes would be produced with recombinant genotypes? a) 0/4 b) 1/4 c) 2/4 d) 3/4 e) all of them, 4/4 3. Chiasmata that result in genetic recombination occur: a) at the two chromatid stage b) between any two chromatids in a tetrad c) only between sister chromatids in a tetrad d) only between non-sister chromatids in a tetrad e) during DNA synthesis 4. The Holliday model explains many of the experimental observations of recombination. What does it mean to say that double-strand DNA breaks are recombinagenic? a) double strand breaks inhibit recombination b) double strand breaks induce recombination c) recombination induces double strand breaks d) recombination is mutagenic e) double strand breaks are detrimental 5. What is the product of the Xist locus that is required for X-inactivation? a) a protein that coats the active X-chromosome b) a protein that coats the inactive X-chromosome c) an RNA that coats the active X-chromosome d) an RNA that coats the inactive X-chromosome e) the product has not yet been characterized
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NAME: ___________________STUDENT NUMBER:_____________________ Biology 2CO3: Genetics Winter 2010 Page 3 of 10 Questions 6 to 9. A black female cat (X b X b ) and an orange male cat ( X B Y ) were mated to each other and produced a male cat that was calico. 6. What is the karyotype and genoytype of this cat with respect to the sex chromosomes only?
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This note was uploaded on 06/09/2011 for the course BIOLOGY 2c03 taught by Professor Dej during the Spring '11 term at McMaster University.

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Test 2 - answer key - NAME_STUDENT NUMBER Biology 2C03 Term...

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