BIOLOGY LAB EXAM REVIEW

BIOLOGY LAB EXAM REVIEW - BIOLOGY LAB EXAM REVIEW I....

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BIOLOGY LAB EXAM REVIEW I. Experiment 1: a. Study Objectives b. Know hardy-Weinberg equilibrium i. 5 assumptions for a population to be in hardy-Weinberg equilibrium 1. large population 2. no immigration or emigration 3. no genetic mutations 4. Random mating 5. no natural selection c. know the cause of genetic variation is from the following: i. genetic drift -results from chance changes in allele frequency in small populations ii. natural selection -“survival of the fittest”, differential reproductive success of some genotypes, it is considered ‘adaptive change’ because it usually results from interaction with the environment iii. mutation d. note: when you see a slide w/ red blood cells it is either showing sickle cells or African sleeping disease. e. Gel analysis i. When there are two lines on one line of the gel then it is heterozygous 1. ex: 2. f. i. Genetic bottleneck effect =occurs when there is a catastrophic reduction in a population so that the gene pool of the survivors is adversely affected. The resulting population is based on a few individuals that are less genetically diverse then the pre- catastrophe population 1. figure 1-7 ii. Founder effect =is a population founded by a relatively small group of individuals that do not have the genetic variability of the original, parent, population 1. figure 1-9 g. heterozygote advantage- adaptation of recessive allele that was adapted in order to help survive i. ex: people became anemic because the sickle cells helped prevent getting sick from malaria h. know several ways deleterious alleles persist despite selection against them in a population (pg15)
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II. Experiment 2
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This note was uploaded on 04/19/2008 for the course BIOL 112 taught by Professor Vaughn during the Spring '08 term at Texas A&M.

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BIOLOGY LAB EXAM REVIEW - BIOLOGY LAB EXAM REVIEW I....

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