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Artificial selection of corn

Image caption:
Plants and animals are domesticated through artificial selection, which works like natural selection does, but with humans instead of nature doing the selecting. Here, humans plant only the plump teosinte kernels the plants that grow from those seeds carry more genes for plumpness, but they still vary in many ways. Over many generations of selection, the frequency of desirable gene variants increases in the population and so does the quality of the crop.

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