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Unformatted text preview: of the metapopulation system may maintain more heterozygosity than a simple population of similar total population size. The solution to this is not general since metapopulation systems may have varying degrees of migration between demes (at some level of migration, metapopulations become 'systems of subpopulations' since in the strict sense the demes of a metapopulation experience little gene flow.) Metapopulations can also contribute to the purging of deleterious recessive alleles . With some level of inbreeding in demes, deleterious recessives will be selected against. With limited amounts of gene flow, the system can effectively purge these alleles that might not be expressed in a large random mating population. One approach is to have semi- isolated subpopulations with corridors for dispersal ....
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- Fall '10