BIO305_F06_ZHANG_TZFIRA_Exam2_KEY

BIO305_F06_ZHANG_TZF - Bio305 Genetics Exam II Fall 2006 1 INSTRUCTIONS 1 For your exam to be scored you MUST use a#2 pencil 2 BEFORE BEGINNING THE

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Bio305 Genetics Exam II, Fall 2006 1 INSTRUCTIONS 1. For your exam to be scored, you MUST use a #2 pencil. 2. BEFORE BEGINNING THE EXAM, fill out all information sections on the accompanying answer sheet COMPLETELY. a. Read and follow instructions on the form EXACTLY. b. Grid in your NAME, STUDENT ID #, and DISCUSSION SECTION NUMBER on the left-hand side of the answer sheet. c. Be VERY NEAT and careful when filling out the answer form. The scanning machine is very sensitive and stray pencil marks could be interpreted as answers. 3. Each question has only one BEST answer. 4. When you finish, hand your answer sheet and exam to a GSI PERSONALLY. Do not give it to anyone else to hand in. Only one answer sheet will be accepted from each student. 5. There are 4 points for each of the 25 multiple-choice questions. 6. There is a statistical table at the end of the exam, in case you need it. Blank paper has been attached to the exam to give you room to work. SUGGESTIONS: Work through exam circling answers on paper copy. When you are finished, review your answers. Only then (or with ~15 minutes of exam time left) should you fill in the scantron answer key.
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Bio305 Genetics Exam II, Fall 2006 2 1. Geneticist Josh Smith studied the inheritance of weight in a population of squirrels. He observed a relationship between the average weight of parents and that of their kids as shown in the following figure. What conclusion can he make? a) The broad-sense heritability of squirrel weight is about 0.7 in the population studied. b) The broad-sense heritability of squirrel weight is about 1.2 in the population studied. c) The broad-sense heritability of squirrel weight is about 0.8 in the population studied. d) The broad-sense heritability of squirrel weight is about 1.3 in the population studied. e) The narrow-sense heritability of squirrel weight is about 0.7 in the population studied. f) The narrow-sense heritability of squirrel weight is about 1.2 in the population studied. g) The narrow-sense heritability of squirrel weight is about 0.8 in the population studied. h) The narrow-sense heritability of squirrel weight is about 1.3 in the population studied. 0 100 200 300 400 500 600 700 800 0 200 400 600 800 Average weight of parents (grams) Average weight of kids (grams) 2. Which statement about heritability is NOT correct? a) The narrow-sense heritability of a trait is defined as the proportion of phenotypic variance of the trait that is attributable to additive genetic variance. b) Broad-sense heritability cannot be lower than narrow-sense heritability for a given trait in a given population. c) Heritability is always non-negative. d) Twin studies allow the estimation of heritability in humans because twins are genetically identical.
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This note was uploaded on 12/12/2010 for the course BIOL 305 taught by Professor Zhang during the Fall '10 term at University of Michigan.

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BIO305_F06_ZHANG_TZF - Bio305 Genetics Exam II Fall 2006 1 INSTRUCTIONS 1 For your exam to be scored you MUST use a#2 pencil 2 BEFORE BEGINNING THE

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