Origin of Species - Origin of Species Where do New species...

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Origin of Species Where do New species Come From? - New Breeding Population (reduced gene flow) - Evolution - Reproductive isolation - New species - Biodiversity What is Evolution? - Evolution: change in allele frequencies in a population over time (if freq. are stable, pop not evolving. - Locus: speci±c location of a gene/ DNA sequence on a chromosome (usually produces protein) - Allele: a variant of DNA sequence/locus (e.g. an eye color locus has 2 alleles; yellow and red) - Population: localized group of interbreeding individuals - Gene pool: total aggregate of alleles in a pop - Populations evolve, individuals do not! What Changes Allele Frequencies? - Mechanisms of evolution: - Migration (gene flow) - More like allele flow. - Mutation - Genetic Drift - Random changes in allele frequency within population over time. - All populations drift but drift most effective in small populations
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- Causes some alleles to past over in a generation and some alleles to not. - (Do not need to know his name) Sewell Wright: Geneticist who
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Origin of Species - Origin of Species Where do New species...

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