The underlying phenomenon that makes selective breeding or artificial selection possible is genetic variation. It is possible to have phenotypic variation in natural populations because of.

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Phenotypic variation in natural populations is primarily due to differences in alleles for specific traits. This genetic variation is what selective breeding or artificial selection exploits to produce desired traits. Gene inversion can contribute to genetic diversity, but it is the differences in alleles that directly result in phenotypic variation.

The Underlying Phenomenon That Makes Selective Breeding or Artificial Selection