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Unformatted text preview: name:_______________________ student ID:_____________________ Genetics L311 exam 1 September 25, 2009 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 and please 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 _______ (18 points possible) page 5 _______ (20 points possible) page 6 (24 points possible) total _______ (of 100 points possible) 1 name:_______________________ student ID:_____________________ 1. Short answers (2 points each, 20 points total) a. The mitotic spindle is the structure that physically moves chromosomes during cell division. b. Pleiotropy is when a mutation in a single gene affects many traits. c. An individual in which all copies of a particular gene are identical is said to be homozygous for that gene. d. Phenotype refers to observable properties of an individual. e. In many XY species, the pseudoautosomal region is the small region found on both the X and Y chromosomes. f. When heterozygotes display a phenotype intermediate between that of individuals homozygous for either form of the gene, the trait is said to be semi or incompletely dominant . g. Nondisjunction was viewed by many as proof of the chromosome theory of inheritance. For the following, please provide a brief definition of the term given: h. synapsis: Pairing of homologous chromosomes during meiosis....
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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 .
- Fall '10