Answer:
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
mutation
Step-by-step explanation:
Random mating, random fertilization, and recombination between homologous chromosomes during meiosis(which reshuffles alleles within an organism's offspring).
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