Genetic Variation
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8 Terms
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Why is genetic variation important?
It enables species to survive environmental change by developing beneficial adaptions via natural selection.
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List processes that increase genetic variation.
Mutation, gene flow, meiosis, sexual reproduction.
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Mutation
Changes in DNA give rise to new alleles
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Gene flow
The movement of genes between populations in different locations
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Meiosis
Egg and sperm formation shuffle the chromosomes from parents
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Sexual reproduction
Radom sperm and egg combinations enhance variatio n
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Howdo meiosis and sexual reproduction increase variation?
By generating new combinations of alleles
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What is the only way new alleles form?
Mutations (the original source of all genetic variation)
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