What are the variations? How are they produced?
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For a given population, there are three sources of variation: mutation, recombination, and immigration of genes. However, recombination by itself does not produce variation unless alleles are segregating already at different loci; otherwise there is nothing to recombination
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The difference in the character among individuals of some species are called variations. They are caused in sexual reproduction as Gene's from two parents are involved .The variations lead to evolution.
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