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Edited on Fri Nov-07-03 07:16 AM by treepig
applied to many different things that it lacks any rigorous meaning.
nevertheless, there is no doubt that Mother Nature is by far the biggest genetic engineer out there.
as dinoboy points out, she has supplied mechanisms for trans-kingdom (i.e. animal to plant, or vice versa) gene trasfers to occur. and if you want to believe that because mother nature is involved, these transfers are benign - well, you couldn't be more mistaken. for example such trans-kingdom gene transfer via HIV causes AIDS and via the papiloma (sp?) virus causes cancer. (there are many more examples).
another "genetic engineering" mechanism in play by mother nature is the propensity for the development of genetic diversity. already there have been over 1.8 million SNP's (single nucleotide polymorphisms) detected in human genes. what that means is that there are not ~30,000 different human genes, but when all the variants of each gene are considered, there are millions (and new ones are constantly appearing). the implication for this incredible genetic diversity is that if you eat a corn or beef product (to give but two examples) the corn plant or cow that these foods come from likely contained a few new forms of genes that had never been tested before. it surprises me that the anti-gm food crowd, who use the lack of complete testing of gm crops as an endless talking point, eat anything at all, especially natural foods that contain much greater (untested!!) genetic diversity than laboratory-derived cloned or gm plants or animals.
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