The Development of Science and Technology Brings us New Thinking (II)

24 Dec

Transgene technology

Crops that have been improved by biotechnology have a major impact on the future of mankind. For example, genetically modified seeds can effectively resist pests and droughts, have high economic value, and help developing countries reduce costs and increase production. As this technology enters the stage of practicalization and commodification, its negative effects are beginning to emerge. Because it allows humans to "arbitrarily modify" biological life, scientists worry that the creation of new genetics and organisms may be harmful to humans, causing new pollution to the ecological environment, the so-called genetic pollution, this new source of pollution is hard to eliminate. A paper published in 1996 by the Danish National Research Institute said that the herbicide-tolerant transgenic rapeseed and weeds were combined to produce herbicide-tolerant weeds, suggesting that genes produced by transgenic technology can spread to nature. A report published by the University of Arizona and other agencies said that some insects have been found not to die from eating pest-resistant crops because they have been resistant to the toxins produced by genetically modified crops. The American Ethics and Toxicity Center's experimental report said that the anti-cancer component isoflavones were reduced in herbicide-tolerant genetically modified soybeans compared to conventional soybeans.

check here .The birth of the cloned sheep Dolly marks that humans have mastered this technology. The principle of this breakthrough is not complicated on the surface, but it involves many basic theories in biology and has extremely high technical difficulty. The scientists first extract all the genetic material in the egg cells of the sheep, and then fuse the mammary gland cells of the 6-year-old ewes to form an egg cell containing the new genetic material, cause it to divide and develop into an embryo. When the embryo grows to a certain extent, it is implanted into the uterus of another ewe, so that the ewes give more profit. In this process, if the genetic material is genetically modified, the lamb's gene will undergo the same change. The benefits of this breakthrough are obvious. Using this technique, a large number of genetically pure animals can be replicated and the animal's genes can be engineered very easily.


Dr. Wilmot, the head of the research team that achieved this result said that the purpose of studying this technology is to cultivate a large number of excellent livestock, provide certain pharmaceutical raw materials, provide transplantable organs suitable for the human body, and provide more suitable animals for medical experiments. However, Dolly has sparked a fierce debate around the world. The focus is: Is this technology that can theoretically replicate human beings be a gospel or a disaster? Although most people believe that the breakthrough in cloning technology is a major Scientific and technological achievements, human beings have the ability to use this technology correctly, but some scientists are worried that this technology is likely to become Pandora's box. Firstly, it may cause long-term adverse effects on the ecological environment. If this kind of asexual reproduction technology is widely promoted in animal husbandry, it is likely to destroy the ecological balance and lead to the mass spread of some diseases; then, if it is applied to the reproduction of human beings, there will be a huge ethical crisis.

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