ANTH 1301 Lecture 5: Lecture 5
19 Oct 2015
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Document Summary
Thereafter the forces of natural selection act on variation. Variation: change through mutation or meiosis mechanisms (recombination, cross over, etc. : mutation: produces completely new genetic material/ alleles, meiosis: change in genotype/ phenotype through combining old genetic material, natural selection occurs after variation. *the modern synthesis built on the ideas and mechanisms put forth by darwin, mendel, etc. Genetic drift: when you slowly have less and less frequent contact (sex) Evolution is defined by a change in allele frequency (how often a genotype and /or phenotype is expressed. Allele determines the genetic make-up of a population since a common gene pool is shared through sex. Population is defined by community with a number of mating individuals producing viable offspring. Gene flow: the exchange of genes between populations (occurs in large populations). Backcrossing: allows a desirable parent gene (aka elite gene ) to be maintained by obviating the effects of.
