Final_Review - Fall2006 I.Newmaterial() .

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Final Exam Review Guide for BioG109 Fall 2006 Resources you should use to help you prepare for the final exam include : I. New material (approximately 40 questions) – This includes material covered since prelim 2 see course web notes for coverage. Prepare for this portion of the exam as you would for a regular prelim. Use Course notes, ppts and review guide (see below), textbook, assigned readings to help you study. II. Comprehensive portion of exam (approximately 40 questions) - Study the questions/answers for Prelims 1 & 2 that you took this semester. The exact same questions will not be used, however, you may see ones similar to those given on the first two prelims that you took. Identify questions that you still do not understand and seek help from a member of the course staff (TA’s, Drs Winkler or Balko). Also see the overview review guideline (below) of what we would like you to leave this course knowing. III. Lab material (approximately 10 questions) – These questions will be designed to determine if you understand the main concepts presented during lab. See the review guide below to help you focus on key concepts from lab. ________________________________________________________________________ I. Concept and definition questions to help you study the ‘new material’ presented for the final : 1. Expect to be asked questions about allele frequencies, Hardy- Weinberg Equilibrium, Genetic Drift & Bottlenecks on the Final Exam. i.Allele frequencies – percentage of each allele present in a population ii.Hardy-Weinberg – figure out number of each allele present and divide it by total number of alleles iii.Genetic drift – change in allele frequency due to chance (more common for small populations) iv.Bottlenecks – genetic drift resulting from drastic reduction in population size (reduces overall diversity) 2. What is the following equation [P 2 + 2pq + q 2 = 1] used for? What do each of the variables in the equation represent? i.Equation is used to figure out genotypic frequency calculations ii.Variables represent the frequencies of each possible allele 3. What are prezygotic and postzygotic isolating mechanisms? i.Prezygotic include: 1. Habitat isolation 2. Behavioral isolation 3. Temporal isolation 4. Mechanical isolation 5. Gametic isolation ii.Postzygotic include 1. Reduced hybrid viability 2. Reduced hybrid fertility 1
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3. Hybrid breakdown 4. In terms of population genetics, what is a bottleneck, and what causes it? i.Genetic drift ii.Results from drastic reduction in population size iii.Reduces overall diversity 5. What is stabilizing selection? i.Natural selection that favors intermediate variants by acting against extreme phenotypes 6. What is a mutation and what effect may it have on allele frequencies in a population? i.Mutation is a change in the nucleotide sequence of DNA
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Final_Review - Fall2006 I.Newmaterial() .

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