genetic exam 1 martens

genetic exam 1 martens - BIOSC 0350 Spring Term 2084 First...

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BIOSC 0350 Name: Spring Term 2084 First Mid-Term Exam Signature: February 7, 2008 Dr. Joe Martens INSTRUCTIONS: 1. Print your name at the top of each page and make sure you have 14 exam pages that includes two pages of scrap paper. 2. Sign the first page of this examination in the space provided. 3. Take a few moments to look over the entire exam before answering any questions. Then, begin with the questions you are most comfortable answering. 4. Show your work. In some cases partial credit will be given. 5. Please write legibly. Make your drawings clear. Be concise; you will not be given credit for extraneous information. 6. Some of the model systems described in this exam parallel actual genetic systems but are solely derived from the imagination of the instructors. 7. Remember to relax and do your best. Good Luck!! SCORES ON COURSEWEB: Please check one ___ Post my scores on CourseWeb using the last five digits of my PeopleSoft number as my identifier. ___ Post my scores on CourseWeb using these five digits _ _ _ _ _ as my identifier. ___ Do not post my scores on CourseWeb. Print Answer Key
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Name Page 2 of 12 BIOSC 0350 Mid-Term Exam 1 February 1, 2007 Question Possible Points Score 1 20 2 22 3 20 4 22 5 16 Total 100
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Name Page 3 of 12 BIOSC 0350 Mid-Term Exam 1 February 1, 2007 1. 20 points (2 points/question) Answer the following multiple-choice questions by circling the correct answer. i) Sickle cell anemia is a recessive trait in humans. In a cross between a father who has sickle cell anemia and a mother who is heterozygous for the gene, what is the probability that their first three children will be normal? A. 1/4 B. 1/2 C. none D. 1/8 E. 1/16 will be albino ii) In a cross A/A;B/B × a/a;b/b, what proportion of the F 2 offspring are expected to be homozygotes for both genes? A. 1/4 B. 1/2 C. 1/8 D. All are homozygotes. E. None are homozygotes. iii) When the same gene is related to respiratory problems and sterility, it can be described as A. pleiotropy. B. codominance. C. incomplete dominance. D. complete dominance. E. penetrance and expressivity. iv) Which of the following ratios from dihybrid crosses show independent assortment? A. 9:3:3:1 B. 9:7 C. 9:3:4 D. 13:3 E. All of the choices are correct. v) What is the correct order of the following meiotic events. A-Segregation of homologous chromosomes to opposite poles. B-Segregation of sister chromatids to opposite poles. C-alignment of homologous pairs on the midplate of the cell.
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This note was uploaded on 09/25/2009 for the course BIOSC 350 taught by Professor Martens during the Spring '07 term at Pittsburgh.

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genetic exam 1 martens - BIOSC 0350 Spring Term 2084 First...

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