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BILDSTUDY3 - 1 Natural selection differential survival and...

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1. Natural selection : differential survival and reproduction of phenotypes a. Phenotype- characteristics of organism due to genes and environment i.e change of plumage color due to season b. Genotype- genetic composition i.e different color forms of geese Fitness- contribution of individual to a gene pool of the next generation relative to others Artificial selection- natural selection by humans for a goal 2. Evolution cause by: individuals vary, natural selection, variation is heritable a. individuals varying- i. Mutation: only source of new genetic variation ii. Sexual recombination: shuffling of genes (review meiosis) Variation is necessary for evolution but does not cause evolution 3. Peter and Rosemary Grant on Daphne Major in Galapagos Islands a. Focused on medium ground finches b. Heritability – proportion of variation in a trait that is genetic [genetic variation/ phenotypic variation] look at question for this [slope of best fit line] ??????
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