Microevolution accepts changes within a particular organism while remaining the same organism. For example, a red back frog can change into a blue back frog over time, but no matter what they are still frogs. Microevolution is just the way animals get different traits by evolving but they still remain the same animal.
the three way variation can occur are :
Mutations alter the order of bases in the nucleotides of DNA. Mutations are likely to be rare and most mutations are probably harmful, but in some instances the new alleles can be favored by natural selection.
Independent assortment (recombination of chromosomes that occurs during sexual reproduction)
And the Crossing over that happens during meiosis
Independent assortment (recombination of chromosomes that occurs during sexual reproduction)
And the Crossing over that happens during meiosis
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