2002 final no key

2002 final no key - LS4 Lec2 Final Exam 3/21/2002 _ Last...

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1 LS4 Lec2 Final Exam 3/21/2002 _________________ _________________ _________________ ________________ Last name First name Student ID Disc. Section 1 ______________ 6 ______________ 11 ______________ 16 ______________ 2 ______________ 7 ______________ 12 _____________ 17 ______________ 3 ______________ 8 ______________ 13 _____________ 18 ______________ 4 ______________ 9 ______________ 14 _____________ 19 ______________ 5 ______________ 10 _____________ 15 _____________ Total __________________ Discussion __________________ Midterm 1 ________ __________________ Midterm 2 ________ __________________ Midterm 3 ________ __________________ Quarter total score __________________ Quarter grade __________________ Show All Your Work for Full Credit.
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2 1. 15 pts A test cross of a tri-hybrid (the F1) gave these results (the F2): all wild type 24 dumpy wings 34 hooked bristles 26 purple eyes 16 dumpy wings & hooked bristles 16 dumpy wings & purple eyes 24 hooked bristles & purple eyes 34 dumpy, hooked & purple 26 200 a. What were the genotypes of the purebred P generation parents that created the F1? b. Determine the map of these traits and the distances that separate the markers. c. What is the length of this linkage group? 2. 10 pts. One in 10 males in the US has some form of X-linked recessive colorblindness. a. What is the colorblind allele frequency in the US population? What is the expected proportion of females with normal color vision?
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3 3. 15 pts. Flowers of a plant species can be scarlet, red, pink, coral or white. A series of crosses between plants produced the following results: Cross Parental phenotypes Progeny 1 scarlet x red all scarlet 2 scarlet x scarlet 76 scarlet, 25 pink a. red x red 86 red, 29 pink b. scarlet x pink 49 scarlet, 52 pink c. scarlet x scarlet 69 scarlet, 22 red d. scarlet x red 50 scarlet, 51 red e. scarlet x red 54 scarlet, 26 red, 25 pink f. pink x pink all pink g. scarlet x red 49 scarlet, 25 red, 23 coral h. coral x coral 60 coral, 29 pink, 31 white i. pink x white all coral j. white x white all white k. scarlet x white all scarlet a. How many genes are involved in the inheritance of flower color in this plant? Indicate all possible genotypes for the following phenotypes, scarlet- red- pink coral- white- 4. 10 pts. Gene X has three alleles X 1 , X 2 and X 3 with frequecies of 0.6, 0.3 and 0.1 in the population, respectively. Given random mating, calculate the combined frequency of all heterozygotes in the population.
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4 5. 15 pts. In the mushroom species kilumded, cap color is determined by four independently segregating alleles A, B, C, and D. Loss-of-function mutations in any of these genes result in the inability to synthesize pigment as diagramed below: When both the red and blue pigments are produced, the mushroom caps are purple. Mushrooms with the genotype AaBbCcDd are crossed with those of genotype AaBbCcdd. a. What color are the caps of these parents? b. For each phenotype below, determine what proportion of the progeny are expected to have each of the following cap colors: white- yellow- orange- red- blue- purple-
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5 6. 15 pts. yellow body males with bar eyes were crossed with females with normal body color and normal eye shape. Their progeny were normal body color daughters with bar eyes and sons with normal body color and normal eyes. Crosses of F1 brothers x sisters gave these results in the F2: 400 bar eye, normal body females 200 bar eye, yellow body males 400 normal eye, normal body females 200 normal eye, yellow body males 200 bar eye, normal body males
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2002 final no key - LS4 Lec2 Final Exam 3/21/2002 _ Last...

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