Advantages: New economically important varieties, Better Quality Food, Higher Yields, Disease Resistant, Gentle animals, Cattle without horns, Disadvantages: reduced genetic variation, creating physical problems for animal, may affect other organisms in an unpredictable way, may have unpredictable results e.g. weaken organisms to attacks from pests or disease,

Selective Breeding

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切換範本

恢復自動保存: ?