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The two main sources of genetic variation are mutations and recombinations of genes as a result of sexual reproduction. A mutation is a permanent change in the DNA within a gene. Continue Reading. Some mutations, which affect all cells in an organism, are inherited from a parent.
Random mutations. Gene shuffling(crossing over) and mutations are the two main sources of genetic variation. Mutation and recombination.11 people found this useful.he two main sources of genetic variation are gene shuffling and  mutations. A mutation is a process wherein the structure of a gene  is altered. Edit. Share to: Blobbert. 37,033 Contributions. Answered.