exam2-08key - name:_ student ID:_ Genetics L311 exam 2...

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name:_______________________ student ID:_____________________ Genetics L311 exam 2 October 24, 2008 Directions: Please read each question carefully. Answer questions as concisely as possible. Excessively long answers, particularly if they include any inaccuracies, may result in deduction of points. You may use the back of the pages as work sheets, but please write your answer in the space allotted. However, you must show all your work. Clearly define your genetic symbols. We will not make guesses as to what a particular symbol is intended to mean. Also, don’t assume that strains are true-breeding unless this is stated in the question. Finally, show all your work. Good luck. page 2 _______ (20 points possible) page 3 _______ (18 points possible) page 4 _______ (12 points possible) page 5 _______ (10 points possible) page 6 (22 points possible) page 7 (18 points possible) total _______ (of 100 points possible) 1
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name:_______________________ student ID:_____________________ 1. Short answers (2 points each, 20 points total) A. A(n) base analog is a compound that can be incorporated in place of a normal nucleotide and if it is, it can cause mispairing leading to a mutation. B. A DNA repair pathway that uses newly replicated DNA to repair DNA damage is called replicative repair . C. A chromosome in which the centromere extends the length of the chromosome is said to be holocentric . D. A mutation that completely eliminates gene function is called a null mutation . E. Recombination results when crossing over produces a combination of alleles not present in the parent’s chromosomes. F. Silent is a mutation that results in a codon that encodes the same amino acid. G. Traits seen only in one gender are said to be sex limited . For the following, please provide a brief definition of the term given: H. antibody: The protein produce of the immune system that specifically binds its target. I. chromatin: DNA + protein; makes up the chomosome J. telomerase: Enzyme that adds repeat sequence at chromosome ends. 2. In your studies of the exceptionally rare Glisczcynski’s sparrow in Bloomington you discovered three recessive mutations that affect the birds: ( b ) produces a pointed beak instead of 2
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name:_______________________ student ID:_____________________ blunt, t causes turquoise colored feathers instead of black, and l causes abnormally long tail feathers. You cross triply heterozygous females with homozygous recessive males and find the
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This note was uploaded on 07/01/2011 for the course L 311 taught by Professor Forrester during the Fall '10 term at Indiana State University .

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exam2-08key - name:_ student ID:_ Genetics L311 exam 2...

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