Exam 1 (2010 b) - BIOL 3301 Midterm Exam#1 September 23rd...

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1 BIOL 3301 Midterm Exam #1 Evening Pink September 23 rd , 2010 There are a total of 10 pages in this exam. This exam consists of 34 questions worth a total of 100 points. All questions are multiple choice and there is one best answer for each question. Record your answers on the scantron sheet, and answer only once for each question or you will be automatically marked wrong. Use a #2 pencil. Name_________________________ ID#__________________________
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2 1. The trait segregating in the following pedigree is most likely: a. autosomal recessive b. autosomal dominant c. sex-linked recessive d. autosomal sex-limited e. cytoplasmic 2. What are the properties of a “tester” strain that is used to evaluate a genotype? a) the tester strain is one of the strains originally mated b) the tester strain is homozygous recessive for each gene being evaluated c) the tester strain is homozygous dominant for each gene being evaluated d) the tester strain has no specific genetic requirements e) the phenotype of the tester strain must be different from that of the original strains 3. A man who carries an X-linked allele will pass it on to a. all of his daughters. b. half of his daughters. c. all of his sons. d. half of his sons. e. all of his children. 4. A recessive mutation in the ebony gene E gives flies black bodies. What proportion of the F 1 offspring of a mating between two E + /e flies will have black bodies? a) 1/4 b) 1/3 c) 1/2 d) 2/3 e) 3/4
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3 Questions 5 - 8 . You have performed the following Dihybrid cross in Drosophila using the recessive orange eye ( o ) and mini wing ( m ) mutations. The o+ (Red-eyed) and m+ (normal Wing) are dominant wild type alleles. o m X o m o+ m+ o m Progeny: Phenotype # of Progeny Orange-eyed, mini wing 382 Red-eyed, normal wing 395 Orange-eyed, normal wing 223 Red-eyed, mini wing 247 Total Progeny 1247 5. Assuming independent segregation what is the Chi 2 value? a. 3 b. 76.775 c. 311.75 d. 0.25 e. 0.05 6 . How many degrees of freedom for this Chi 2 test? a. 1 b. 4 c. 0.05 d. 3 e. 311.75 7. Referring to the Chi 2 table below, which of the following statements is true: a. The probability of having a Chi 2 value this large is greater than 0.05 b. The data supports independent segregation c. In this experiment, any Chi 2 value equal to or greater than 7.815 is significant and the hypothesis is rejected d. In this experiment, any Chi 2 value equal to or greater than 5.024 is significant and the hypothesis is rejected 8. Assuming linkage between orange and mine wing , the estimated recombination frequency would be: a. 0.377 b. 0.179 c. 470 d. 0.623 e. 0.5
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4 9. Which of the following statements is not true?
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Exam 1 (2010 b) - BIOL 3301 Midterm Exam#1 September 23rd...

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