In the past, everything we ate was non-GMO, and was the healthiest and safest. But now our lives are about to be replaced by GMOs. Although GMO foods have advantages in some aspects, they can never be compared with non-GMO foods. 1. What is non-GMO It is not something that is genetically modified. To understand this question, we must first understand what genetically modified organisms are. Genetically modified organisms mean that scientists change the genes of animals and plants in laboratories and then create food types with new characteristics. For example, by adding an antifreeze gene from marine fish grown in the Arctic to ordinary tomatoes, this popular food can be preserved longer in the winter, greatly extending its shelf life. The topic of genetically modified foods quickly split into two camps. Those who support it believe that technological advances can greatly improve our living standards, while those who oppose it believe that genetically modified foods can cause unexpected poisoning or allergic reactions. 2. Genetically modified organisms 1. Artificial genetic modification Introducing artificially isolated and modified genes into the genome of an organism, The expression of the introduced gene causes the heritable modification of the characteristics of the organism. This technology is called transgenic technology. technology). The terms "genetic engineering", "genetic engineering" and "genetic transformation" that people often talk about are all synonyms for genetic modification. Nowadays, artificial technology for changing the traits of animals and plants is often called genetic modification technology (in a narrow sense), while the manipulation of microorganisms is generally called genetic engineering technology (in a narrow sense). Organisms modified by genetic engineering technology are often referred to as "genetically modified organisms" (GMOs) in the media. 2. Natural genetic modification It is not artificially directed, but a transgenic phenomenon that occurs autonomously in animals, plants or microorganisms in nature, such as lentiviral vectors The hepatitis B virus DNA is integrated into the chromosomes of human sperm cells, the bacteriophage inserts its own DNA into the lysogenic cell DNA, Agrobacterium and cauliflower mosaic virus (CMV), etc. 3. Plant genetic modification Transgenic plants are plants that contain foreign genes in their genome. It can be obtained through protoplast fusion, cell recombination, genetic material transfer, chromosome engineering technology, and may change certain genetic characteristics of plants to cultivate new crop varieties that are high-yield, high-quality, virus-resistant, insect-resistant, cold-resistant, drought-resistant, flood-resistant, salt-alkali-resistant, and herbicide-resistant, such as corn and rice. , Arctic avocado, and genetically modified triploid poplar. Moreover, transgenic plants or in vitro cultured cells can be used to produce expression products of exogenous genes. For example, genes such as human growth hormone, insulin, interferon, interleukin 2, epidermal growth factor, and hepatitis B vaccine have been expressed in transgenic plants. |
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