Midterm I Winter 06 - Answer Key

Midterm I Winter 06 - Answer Key - Name:_ BIS101-01, Winter...

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Name:_________________________ ID:__________________________ BIS101-01, Winter 2006 Dr. D.J. Kliebenstein, Instructor Midterm Exam I Please print your name and ID number on each page of the exam. The exam has 11 questions and a total of 120 points For full credit, show all of your work. AUTHORIZATION FOR PUBLIC DISTRIBUTION OF GRADED PAPERS OR EXAMINATIONS I,_________________________________, Student ID No._________________________________: Authorize the University to publicly distribute my graded exam (e.g., handed out in class or left in an exam bin) for BIS101-02. If I do not sign, then I must see the instructor to pick up my exam. Signed:_______________________________________ Dated:__________________________________
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Name:_________________________ ID:__________________________ 1 ________________ 2 ________________ 3 ________________ 4 ________________ 5 ________________ 6 ________________ 7 ________________ 8 ________________ 9 ________________ 10 ________________ 11 ________________ Total ____________________
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ID:__________________________ 1. (10 points) Define the following terms: Test Cross: A cross between and individual of unknown genotype or a heterozygote and a tester individual. Sex Linkage: The location of a gene on a sex chromosome Complementation: The production of a wild-type phenotype when two different mutations are combined in a diploid. Trait: A genetically determined characteristic or condition. For example, flower color is a trait whereas white flowers or purple flowers are a phenotype. Epistasis: Expression of one gene pair masks or modifies the expression of another. 2. (9 points) Name and describe how DNA can transfer between bacteria: Answer: Conjugation: The union of two bacterial cells during which chromosomal material is transferred from the donor to the recipient cell Transformation: The directed modification of a genome by the external application of DNA from a cell of different genotype. Viral transduction: The use of bacteriophage to transfer DNA from one bacteria to another. 3. (14 points) A nematode that comes in various colors, shapes and lengths is being studied. Use N and n for neon and plain, B and b for beer belly and skinny, and L and l for long and short. If two Nn Bb Ll nematodes are crossed and the genes assort independently in a autosomal fashion, what fraction of the offspring will be: A. Long 3/4 B. plain 1/4 C. Neon with a beer belly 9/16 D. Neon skinny and short 3/64 E. nn Bb L- 6/64 F. N- bb Ll 6/64 G. What is the maximum number of progeny genotypes produced from this cross? Answer: Twenty Seven = 3
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Midterm I Winter 06 - Answer Key - Name:_ BIS101-01, Winter...

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