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<p class="p1">Processo que produz um gene ou cromossomo diferente do tipo selvagem.  Estas mudanças podem mudar a estrutura ou a regulação das proteínas transcritas, o que pode levar os organismos que possuem essas características alteradas a ter uma chance maior ou menor de sobreviver e reproduzir em um determinado ambiente do que outros membros de sua espécie.</p>
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