Exam 2 Notes (Lecture Day 1)
Exam 2 Notes (Lecture Day 1) BIOL 337
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This 2 page Class Notes was uploaded by Carolina Arreola on Wednesday March 4, 2015. The Class Notes belongs to BIOL 337 at San Francisco State University taught by Routman in Spring2015. Since its upload, it has received 126 views. For similar materials see Evolution in Biology at San Francisco State University.
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Date Created: 03/04/15
Evolution Notes 3315 Exam 2 Material Darwinian Fitness The number of babies that a zygote produces on average Individual Fitness The ability of a an individual to go through the life cycle and produce babies Viability The ability of a zygote to make it to adulthood If there are differences in probability among individuals to survive to adulthood we have the potential for Viability Selection The next part of the life cycle is the ability to become part of a mating pair If there are differences among individuals that affect their ability to become mating pairs this is called sexual selection Fecundity number of babies produces differences among individuals of their ability of how many babies is produces is called Fecundity Selection TOTAL FITNESS The number of babies an individual produces Zygotegt Adultsgt Mating Pairs How do we account for Genotype fitness 39 Average the fitnesses of the individuals that have thatgenotype Symbol for genotype fitness it M 39 Subcategories for Genotype Fitness Absolute Fitness and Relative Fitness Absolute Fitness The actual number of babies produced Relative Fitness The absolute fitness of these genotype fitnesses that are standardized by being divided by 1 of those fitnesses EXAMPLE AA Aa aa Absolute Fitness 10 100 100 Relative Fitness 101001 1001001 1001001 Zygotes Viability Selection Adults After Selection Random Mating Zygotes BBBb bb gt BB Bb bb gt B b gt BB Bb bb p2 2pq q2 p2wBB 2pqub q2wBB p2wBBW 2pqubW q2wBBW Average Population Fitness p2wBB 2pqub q2wBB In order to make them frequencies we need to divide these numbers by the total number The total number is just the sum of the 3 genotype numbers W EwBB i wBb i wbb l 3 ltlt This is NOT right DO NOT DO THIS p pBB 12 pBb p2 pq p39 p2wBB pqub W Delta P p39 p Average Excess for Fitness of the B allele A sub B Ab pwBBW qwBbW We can now write the equation for delta p as Delta p pWAb Ab pwBBW qwBbW gt Average Fitness deviation of all the individuals who have the B allele 39 p proportion of B genes found in BB homozygotes 39 wBBW Difference in fitness between BB and the whole population 39 g proportion of B genes found in Bb heterozygotes 39 wBbW Difference in fitness between Bb and the whole population Malaria and Sickle Cell Anemia Fitnesses and phenotypes at the BHemoglobin locus when malaria is present AA AS SS AC SC CC 89 10 20 89 71 131 M R so M A lllllll M Susceptible to malarial no anemia R Resistant to malaria no anemia SC Sickle cell anemia very sick M Susceptible to malaria no Anemia sick
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