111%20Exam%20#2%20S10%20Red%20key-1

111%20Exam%20#2%20S10%20Red%20key-1 - Exam 2 Biology 111...

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Exam 2 Biology 111 – Spring 2010 Dr. David H. Bos INSTRUCTIONS: Fill in your BIOL 111 code number and NOT your PUID in the section of the scantron sheet marked: Student Identification Number. The use of calculators, cell phones or other electronic devices is not allowed during the exam. Read each question carefully and choose the best answer. There are 34 questions on this exam. There is only one correct answer for each question. Do not fill in multiple answers, as they will be marked incorrect. Turn in only the answer sheet when you are done. You may keep the exam. Take your time, think and good luck! Consider the following phenotypic data for questions 1, 2, 3, and 4. Phenotypes of the parental cross: Ab/Ab x aB/aB F 1 test cross results: Ab 444 aB 456 AB 52 ab 48 Total 1000 1. The alleles for which phenotypes are linked on the same chromosome in the parental generation? a. None of the alleles are linked b. 2. How many crossing over events occurred between the genes for A and B in our sample of offspring? a. None b. 10 c. 48 d. 52 e. 100 3. What is the correct combination of alleles for these genes in the F 1 generation? a. All combinations of linked alleles are equally likely b. Ab/aB c. AB/AB d. AB/ab e. ab/ab 4. How many centiMorgans are the genes for A and B apart? a. The genes for A and B are unlinked and cannot be mapped b. 10 cM c. 100 cM 1
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d. 0.10 cM e. 1 cM 5. Which of the following is true regarding alleles of linked genes? a. They show Mendelian patterns of inheritance b. They only occur in the homogametic sex c. They independently assort at meiosis d. They can be partially linked or completely linked e. They must be on different chromosomes Consider the following data for questions 6, 7, 8, & 9. Alport syndrome is a recessive X- linked disease that causes kidney disease and hearing loss. A woman who has Alport syndrome marries a man who does not. 6. On average, what percentage of the daughters of this couple would you expect to have Alport syndrome? a. 0% b. 25% c. 50% d. 75% e. 100% 7. On average, what percentage of the sons of this couple would you expect to have Alport syndrome? a. 0%
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This note was uploaded on 07/08/2010 for the course BIO 111 taught by Professor Dr. bos during the Spring '10 term at Purdue.

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111%20Exam%20#2%20S10%20Red%20key-1 - Exam 2 Biology 111...

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