genetic diversity

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genetic bottlenecks
biology > paper 1 > genetics, variation, and relationships between organisms > genetic diversity and natural selection > genetic diversity
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lots of different alleles means a high genetic diversiy
genetic diversity is the number of different alleles of genes in a species or population
genetic diversity within a population is increased by:
mutations in DNA - forming new alleles
different alleles being introduced from individuals from another population migrating - gene flow
genetic diversity allows natural selection to occur