However, the process of artificial selection existed long before we started using the genetic engineering in laboratories. Plants and animals evolve in order to survive in severe climate “through spontaneous genetic mutation”. Also, people have bred livestock and crops for millennia, choosing the only the biggest, tastiest, and more resistant to extreme weather condition and pests. All these desirable traits and characteristics became perpetuated. We used to call it natural selection. After thousands of years of this intervention cultivated plants and domesticated animals today differ greatly from the wild species they were obtain from. (Touyz 59). Nobody has ever thought about harmful effect of natural breeding on human’s health.
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