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pls pls,help me bout diz coz i need this 4 the nxt day..

2007-01-10 23:00:01 · 4 answers · asked by Anonymous in Science & Mathematics Botany

4 answers

Wrong and wrong.

Genetically modified plants have been genetically engineered, meaning some DNA (a gene or multiple genes) has been added to the DNA of the plant. Often this gene comes from a different species of plants, and sometimes from a totally different organism such as a virus.

The genetic modification is usually done using a bacteria (called Agrobacterium tumefaciens) or by shooting the foreign DNA into the plant to be modified.

2007-01-11 01:47:33 · answer #1 · answered by floundering penguins 5 · 0 0

Nature modifies genes and genomes of organisms all the time. When two organisms "mate" their progeny is a mix of the parent genes. This is done with eggs and semen, pollen and flowers etc. Nature is tough and the fittest usually survive. This is evolution.

By "genetic modification" scientists create new genomes by tricking nature. A whole variety of methods have been developed. One is getting the gene with the desired characteristic into the genome of Agrobacterium tumefaciens and then infecting the plant with the bacterium. The bacterium then transfers the gene to the plant. Another is by a relatively primitive "gene gun" where genes are literally shot into the genome.

Developing genetically modified organisms is relatively expensive and undertaken by big corporations. These have an financial incentive to portray the technology as harmless. However, there are many objections to it. Some have been mentioned in other answers. But one often left out is that the methods of modification sometimes modifies other genes of the genome as well. Usually, the scientists just check to see if the desired genome has been inserted, not if some of the thousands of other genes in the genome has changed from the bruteness of the procedure. Yes, the GMOs growing on some fields could theoretically be producing poisonous - but most likely just dysfunctional - proteins and chemicals.

Particularly controversial is the GMOs of Monsanto and corporations alike. Because they have done GMOs designed specifically to be grown using the pesticides produced by that company. In other words, Monsanto crops are anti-organic. But that is a bit of a different story.

Natural selection - wholly natural or farmer aided - is inherently safer than genetic modification. But in science, genetically modifying organisms it is a powerful research tool. To see what a gene does, "simply" turn it off, grow the organism and observe it.

2007-01-11 02:02:06 · answer #2 · answered by Benno Hansen 2 · 0 1

genetically modified plants differ from other breeded plants.cuz the modification is done in a single plant with out fertilization in most cases
In these plants changes (good characters ) are incorporated in the DNA or gene level, so that they can be passed for many generations
It is not going to harm any person who consumes it.Even recently FDA also approved it.

In general any genetic modifiction can be done externally by virus only, and that modification or change is harmful

2007-01-11 00:28:28 · answer #3 · answered by red rose 5 3 · 0 1

genticaly modified plants are plants which have undergone unnatural selection by scientists to develop a better plant (ie more resistant to disease, grows faster, grows larger, ect)
the contriversy surrounding this is that some of the genetic modifications are using animal genes (ie pigs & cows)... and some people (vegitarians) find this disturbing.

2007-01-10 23:15:16 · answer #4 · answered by beanie_boy_007 3 · 0 1

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