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2007 Midterm 2 - BICD100 WINTER 2007 MIDTERM2 NAME STUDENT...

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BICD100 WINTER 2007 MIDTERM2 Page 1 of 7 NAME ___________________________ STUDENT ID__________________________ SECTION__________________________ MIDTERM 2 2/22/2007 7:00-9:00PM INSTRUCTIONS 1. There are 5 questions, each worth 5 points. 2. Note sheet must have your name and student ID at top of one side. 3. Note sheet must be turned in with your exam. 4. You may use a TI30-series hand calculator only. 5. All other books, papers, and materials including cell phones and pagers must be left 6. All exams will be collected by 9:00PM in the aisles. 7. If you want your graded exam to be left for you to pick up in Pacific Hall 3 rd Floor Lobby, you must sign a release here: Signature:__________________________________________________. Question Point value Points earned 1 5 2 5 3 5 4 5 5 5 Subtotal 25 Extra credit 1 Total
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BICD100 WINTER 2007 MIDTERM2 Page 2 of 7 1. Unicorns have typical diploid eukaryotic genetics. You are studying three genes in unicorns whose recessive mutant alleles cause the phenotypes of miniature, silver, and striped. You cross unicorns from a pure-breeding silver striped strain to unicorns from a pure breeding miniature strain to obtain F1 unicorns. You test-cross these F1 unicorns to a pure-breeding silver striped miniature strain and analyze 500 F2 progeny. You obtain the following data: Parents: silver striped X miniature F2 progeny: # mutant phenotype(s) 2 silver inferred gamete alleles miniature silver striped 24 miniature silver 186 silver
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