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Unformatted text preview: Genetic Isolation Physical barriers can inhibit gene flow and lead to speciation Physical isolation through dispersal (Hawaii islands) Physical isolation through vicariance (actual physical barrier) Genetic isolation through polyploidy o Polyploids can arise through failure to complete meiosis o Tetraploids can only mate with tetraploids (mate selectivity) Tetraploids are typically sterile because homologous chromosomes do not pair correctly during meiosis Genetic isolation through chromosomal inversion o The offspring will be selected against, leading to a loss of one chromosome or reproductive isolation between the homozygotes...
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This note was uploaded on 12/21/2011 for the course ANP 203 taught by Professor Lewis during the Fall '11 term at UCSB.
- Fall '11