Genetic isolate
（重定向自Genetic barrier）
A genetic isolate is population of organisms that has little genetic mixing with other organisms within the same species. This may result in speciation, but this is not necessarily the case. Genetic isolates may form new species in several ways:
Human influences on genetic isolates include restricted breeding of dogs, or a community living secluded away from others (such as Tristan da Cunha or Pitcairn Islands). Far larger and less secluded human genetic isolates are peoples like Sardinians or also the Finns, natives of Finland.