PPT-Genetic Frequency & Natural Selection Project

Golden Girls Plus Alex Media Room B Group Presentation Date 140523 Presenters Alex Bentley 288531 Nancy Bocanegra 320379 Cathy Odom 128180 . Genetic Drift (and Inbreeding). DEVIATION. . from . Hardy-Weinberg Equilibrium. Indicates that . EVOLUTION. Is happening. 4 Major Evolutionary Mechanisms that alter allele frequencies in populations:. Chapter . 11 Page 307. A. . Genetic Variation Within Populations. Genetic variation increases survival rate. Natural selection works on phenotypes differently. Wide range of phenotypes = greater chance of survival with changing environment. A) Directional selection. Chance events . Stabilizing selection . Disruptive selection. Answer Key – LO 1.2. Directional selection is most common wen a population’s environment changes or when members of a population migrate to a new habitat with different environmental conditions than their former one. Stabilizing selection acts against extreme phenotypes and favors intermediates variants. Disruptive selection occurs when environmental conditions favor individuals on both extremes of a phenotypic range over intermediate phenotypes. An example of directional selection is that black bears in Europe increase with size during the colder weather, only to decrease during the warmer weather. An example of stabilizing selection is the birth weights of most human babies lie in the range of 3-4 kg; babies who are much smaller or larger suffer higher rates of mortality. An example of disruptive selections is black- bellied seed cracker finches have two different beak sizes for cracking different types of seeds. . Natural Selection does not always proceed in the expected direction, because several forces could interfere with the action of Natural Selection. Constraints on Natural Selection. Genetic . Variation. SC.912.L.151. SC.912.L.15.10. SC.912.N.1.3. SC.912.N.2.1. SC.912.L.15.8. Survival of the Sneakiest. Roles:. Boy/narrator (B). Girl (G). Sound effect person (SE). Male cricket 1 STRONG, ATTRACTIVE, SINGING (MC1). March 5, 2014. 1. Evolutionary Computation (EC). 2. Introduction to Evolutionary Computation. Evolution is this process of adaption with the aim of improving the survival capabilities through processes such as . 3 Mechanisms for selection and an introduction to . Hardy-Weinberg. Lyell’s Influence. In attempt to . explain the past in terms of present day processes. , Darwin went to local farmers and animal breeders and observed…. Motivation. Most powerful mode of evolution. Explains observation of Descent with Modification. Nonrandom survivorship/reproduction of individuals based on particular features of their phenotype. . Any environmental agent may be the cause of natural selection. Golden Girls Plus Alex Media Room B Group. Presentation Date: 140523. Presenters: Alex Bentley. . 288531. Nancy . Bocanegra. 320379. Cathy Odom 128180. . Spring Feb 2015 . Gene Frequency . Random . g. enetic mutations occurs. Inherent. Variation . Sexual reproduction. . Relationship between Gene Frequency and Natural . S. election. Natural Selection. Jamie . Winternitz. Institute of Botany and Vertebrate Biology, Czech Academy of Sciences. Outline of talk. The Chimp and the River. Negative-frequency dependent selection. Phylogenetic methods. The Island Fox. A) Directional selection. Chance events . Stabilizing selection . Disruptive selection. Answer Key – LO 1.2. Directional selection is most common wen a population’s environment changes or when members of a population migrate to a new habitat with different environmental conditions than their former one. Stabilizing selection acts against extreme phenotypes and favors intermediates variants. Disruptive selection occurs when environmental conditions favor individuals on both extremes of a phenotypic range over intermediate phenotypes. An example of directional selection is that black bears in Europe increase with size during the colder weather, only to decrease during the warmer weather. An example of stabilizing selection is the birth weights of most human babies lie in the range of 3-4 kg; babies who are much smaller or larger suffer higher rates of mortality. An example of disruptive selections is black- bellied seed cracker finches have two different beak sizes for cracking different types of seeds. . 4. Population and Evolutionary Genetics. lachance.joseph@gmail.com. https://. popgen.gatech.edu. /. COMT. (. catechol-O-methyltransferase. ) and test-taking anxiety. What is wrong with this claim?. Case Study #1. D. arwinian view of Life. Evolution of Populations. Origin of Species. 10/26 Obj. TSW explain how selection works in a variety of ways using examples and they will do the bird beak lab to demonstrate understanding..