Biology 1002B Lecture Notes - Lecture 1: Sister Chromatids, Copy-Number Variation, Single-Nucleotide Polymorphism
20 Mar 2016
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Document Summary
Essential outcomes: principles underlying evolution by natural selection: origin of variation, heritability, diferential reproduction, change in genotype of the population over time. All life is related through common ancestry: lineages diverge into multiple daughter lineages. Heritability: evolution involves combinations of heritable changes and selection pressures, if a trait is not heritable, it will not spread, selection pressure: an agent of diferential mortality or fertility that tends to make a population change genetically. Diferential reproduction: organisms best adapted to a given environment will be most likely to survive to reproductive age and have ofspring, relative itness. Change in genotype of a population: allele frequencies in a population change from one generation to the next. Proof of evolution: evidence from the fossil record, historical biogeography, comparative morphology and molecular biology that support the idea of descent with modiication from a common ancestor. Historical biogeography: species on oceanic islands often closely resemble species on the nearest mainland.
