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Mechanical evolution
•Genetic variation is needed for evolution to occur. Variations occur through sexual reproduction and mutations
•Individual organisms do not evolve- populations do
•The % of each allele in present population determines the genetic characteristics of the pop.
How does evolution occur?
•Small events accumulate to form new species
•Changing %/frequencies of alleles within a pop. leads to evolution
•5 common factors can change the allele frequency
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