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2006-08-18 00:29:22 · 6 answers · asked by sanjay d 1 in Science & Mathematics Biology

6 answers

Although "biotechnology" and "genetic modification" commonly are used interchangeably, GM is a special set of technologies that alter the genetic makeup of such living organisms as animals, plants, or bacteria. Biotechnology, a more general term, refers to using living organisms or their components, such as enzymes, to make products that include wine, cheese, beer, and yogurt.
Combining genes from different organisms is known as recombinant DNA technology, and the resulting organism is said to be "genetically modified," "genetically engineered," or "transgenic." GM products (current or in the pipeline) include medicines and vaccines, foods and food ingredients, feeds, and fibers.

Locating genes for important traits—such as those conferring insect resistance or desired nutrients—is one of the most limiting steps in the process. However, genome sequencing and discovery programs for hundreds of different organisms are generating detailed maps along with data-analyzing technologies to understand and use them.

In 2003, about 167 million acres (67.7 million hectares) grown by 7 million farmers in 18 countries were planted with transgenic crops, the principal ones being herbicide- and insecticide-resistant soybeans, corn, cotton, and canola. Other crops grown commercially or field-tested are a sweet potato resistant to a virus that could decimate most of the African harvest, rice with increased iron and vitamins that may alleviate chronic malnutrition in Asian countries, and a variety of plants able to survive weather extremes.

On the horizon are bananas that produce human vaccines against infectious diseases such as hepatitis B; fish that mature more quickly; fruit and nut trees that yield years earlier, and plants that produce new plastics with unique properties.

In 2003, countries that grew 99% of the global transgenic crops were the United States (63%), Argentina (21%), Canada (6%), Brazil (4%), and China (4%), and South Africa (1%). Although growth is expected to plateau in industrialized countries, it is increasing in developing countries. The next decade will see exponential progress in GM product development as researchers gain increasing and unprecedented access to genomic resources that are applicable to organisms beyond the scope of individual projects.

Technologies for genetically modifying (GM) foods offer dramatic promise for meeting some areas of greatest challenge for the 21st century. Like all new technologies, they also poses some risks, both known and unknown. Controversies surrounding GM foods and crops commonly focus on human and environmental safety, labeling and consumer choice, intellectual property rights, ethics, food security, poverty reduction, and environmental conservation (see below for a summary of "GM Foods: Benefits and Controversies").


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GM Products: Benefits and Controversies
Benefits

Crops
Enhanced taste and quality
Reduced maturation time
Increased nutrients, yields, and stress tolerance
Improved resistance to disease, pests, and herbicides
New products and growing techniques
Animals
Increased resistance, productivity, hardiness, and feed efficiency
Better yields of meat, eggs, and milk
Improved animal health and diagnostic methods
Environment
"Friendly" bioherbicides and bioinsecticides
Conservation of soil, water, and energy
Bioprocessing for forestry products
Better natural waste management
More efficient processing
Society
Increased food security for growing populations
Controversies


Safety
Potential human health impact: allergens, transfer of antibiotic resistance markers, unknown effects Potential environmental impact: unintended transfer of transgenes through cross-pollination, unknown effects on other organisms (e.g., soil microbes), and loss of flora and fauna biodiversity
Access and Intellectual Property
Domination of world food production by a few companies
Increasing dependence on Industralized nations by developing countries
Biopiracy—foreign exploitation of natural resources
Ethics
Violation of natural organisms' intrinsic values
Tampering with nature by mixing genes among species
Objections to consuming animal genes in plants and vice versa
Stress for animal
Labeling
Not mandatory in some countries (e.g., United States)
Mixing GM crops with non-GM confounds labeling attempts
Society
New advances may be skewed to interests of rich countries

2006-08-18 00:36:47 · answer #1 · answered by Explorer 5 · 2 0

The Gene Technology Act 2000 (GT Act) makes a distinction between genetically modified organisms (GMOs) and genetically modified (GM) products.

Genetically Modified Organism

Definition: The full definition of a GMO appears under section 10 of the GT Act. In essence, a GMO means:

(a) an organism that has been modified by gene technology; or

(b) an organism that has inherited particular traits from an organism (the initial organism), being traits that occurred in the initial organism because of gene technology.

Genetically Modified Product

Definition: A genetically modified product (GM product) means a thing (other than a GMO) derived or produced from a GMO (section 10 of the GT Act).


For a list of genetically engineered foods currently on the market visit: http://www.ucsusa.org/food_and_environment/genetic_engineering/engineered-foods-allowed-on-the-market.html

2006-08-20 19:43:54 · answer #2 · answered by phd4jc 3 · 0 0

Genetically modified food, leads better life, leads better world
People nowadays are always talking about genetically modified (GM) crops and food. I think GM food is really exciting and cool. We can now eat peanuts even when we are allergic to it because the allergen has been removed by GM!

Firstly, people would like to know whether GM food is safe or not. Well GM food is perfectly safe. Any products are tested and proven safe for animals and humans. Thousands of tests have been take

. . .
Furthermore, GM crops can be manipulated to produce completely artificial substances, from the precursors to plastics to consumable vaccines.






In addition, GM foods are making farmers life much more easier. Scientists say that it offers a way to quickly improve crop characteristics such as yield, pest resistance, or herbicide tolerance, often to a degree not possible with traditional methods.






In conclusion, GM crops and foods are probably the thing that everyone needs because of its usefulness. These seeds not only simplify farming; they show that farmers are making more of their decisions for the growing season when they purchase seed.






GM crops are able to grow in under harsh conditions as they are tough and draught resistance. According to a company named ‘Monsanto’, they led the industry in developing seeds improved with traits to meet multiple grower needs. For example, they integrate insect protection and weed control into the seed itself. Scientists are developing technology that is helping farmers transform the way they manage their farms. Since the planet has been affected by global warming and the weather nowadays is not that good (because of pollution and acid rain), this will be a great advantage for the developing and western world.






Secondly, people would like to know the benefits of GM food. It definitely leads us to a better life and a better world. Farmers demand products that provide value and that are effective and simple to use.

2006-08-18 12:30:44 · answer #3 · answered by Anonymous · 0 1

Genetically modified food is a cross of two or more varieties of grains or pulses it is commonly used in rice .Consider variety X which is disease resistant & variety Y which is with high nutritional value so they cross fertilize parent crops of X & Y to yield a new breed XY after series of cross fertilization & hence gives rise to new variety which posses quatities of both parents.

2006-08-18 14:17:32 · answer #4 · answered by itsd2b 1 · 0 1

Producing hybrids which are extra large, seedless fruits and vegetables, cereals which grow faster (can be reaped faster), These are genetically altered with the intervention of man. very often they are not as tasty and as nutritious as the original food.

2006-08-18 07:40:18 · answer #5 · answered by RAMA K 2 · 2 0

it is the geneticaly engineared food, where the DNA is added from the different organism, where it is not available on the organism by the agrobacterium tumificiance

2006-08-21 08:07:21 · answer #6 · answered by lok 1 · 0 0

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