Midterm2009Key - INSTRUCTORS: Steve Jacobsen Alvaro Sagasti...

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INSTRUCTORS: Steve Jacobsen LS4 MIDTERM Thursday Oct 29, 2009 Alvaro Sagasti STUDENT NAME: _______________________________________________ ID # _________________ (Last) (First) 1 Circle TA name Nicole Matt Krishna Ann Stephanie INSTRUCTIONS 1. This exam is 14 pages long including this front page. Before starting make sure you have all the pages. Put your name and ID on each page!!!!!!!!! 2. No credit will be given for an illegible answer. Regrades will only be considered for answers written in pen (not pencil). 3. No graphing calculators are allowed. 4. Show all your work!! You will not be given credit for answers alone. Circle your answers! QUESTION VALUE SCORE 1 6 2 10 3 11 4 13 5 14 6 12 7 8 8 6 9 16 10 15 11 12 12 12 13 15 TOTALS 150
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INSTRUCTORS: Steve Jacobsen LS4 MIDTERM Thursday Oct 29, 2009 Alvaro Sagasti STUDENT NAME: _______________________________________________ ID # _________________ (Last) (First) 2 (1 ) Ann (6 points) A researcher needs to make a new type of zebrafish to use for her experiments. To make the new fish the researcher breeds a fish with the genotype Aabb to a fish with genotype aaBb. If she needs 250 fish that are heterozygous for both genes, about how many eggs do the parental fish need to lay total? 1000
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INSTRUCTORS: Steve Jacobsen LS4 MIDTERM Thursday Oct 29, 2009 Alvaro Sagasti STUDENT NAME: _______________________________________________ ID # _________________ (Last) (First) 3 (2) Ann (10 points) In pea plants purple flowers are dominant to white and axial flowers are dominant to terminal flowers. A strain of pea plants with purple axial flowers is self crossed and the following progeny result: Purple, Axial: 277 Purple, Terminal: 94 White, Axial: 87 White, Terminal: 29 (a) ( 5 points ) What is the genotype of the parental strain? PpAa (b) ( 5 points ) What percent of the progeny will breed true for both traits? ¼
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INSTRUCTORS: Steve Jacobsen LS4 MIDTERM Thursday Oct 29, 2009 Alvaro Sagasti STUDENT NAME: _______________________________________________ ID # _________________ (Last) (First) 4 (3) Ann (11 points) Harry and Ginny have a son, James, who needs a blood transfusion from a donor with identical blood type. Ginny’s brother Ron has type O blood and her brothers Fred and George have type AB blood. Harry’s mother had AB blood and his father had type O. What is the probability that James will have the identical blood type of his uncle Ron? Draw the pedigree and show all work. Harry will have one i allele. Ginny has a ½ chance of only having one i allele. If Ginny has one i, James has a ¼ chance of having type O blood. Ginny has a ¼ chance of having two i alleles. If Ginny has two i s James has a ½ chance of having type O blood. Therefore both sum product rules apply ( ½ * ¼ ) + ( ¼ * ½ ) = ¼
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INSTRUCTORS: Steve Jacobsen LS4 MIDTERM Thursday Oct 29, 2009 Alvaro Sagasti STUDENT NAME: _______________________________________________ ID # _________________ (Last) (First) 5 (4) Stephanie (13 points)
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This note was uploaded on 08/26/2011 for the course LIFE SCIEN LS4 taught by Professor Jacobsen during the Spring '11 term at UCLA.

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Midterm2009Key - INSTRUCTORS: Steve Jacobsen Alvaro Sagasti...

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