SlagA
Monday 14th September 2009 1:46pm [Edited]
Blackwood
5,335 posts
Quote: Tim Walker @ September 13 2009, 10:45 PM BST
man has certainly put selective pressures which have led to biologiclally-distinct species.
Selective pressure is not the same as splicing in genes from a completely different organism. To suggest neolithic or medieval farmers were doing that (even accidentally) is not the case. In natural selection the genetic material is always something contained within or derived from the existing pool. When it is introduced by outside agencies, such as viruses, it nearly always ends in disaster.
As to man developing distinct species. Again, AFAIA this isn't true. The idea of 'species' is a manmade concept that the natural world often refuses to accept. Cats and dogs, as Timbo points out can interbreed with wild relatives. Not only that distinct 'species' can interbreed when the opportunity presents - ligers and tigons come to mind. We can't even work out a satisfactory definition of species, let alone know in what way the target organism can interact with the countless other species it encounters in the complex web outside of a laboratory.
As far as I'm aware, millenia of breeding programs have failed to produce anything we could regard as a new organism. We've only managed to refine an animal according to our taste.
Quote: Tim Walker @ September 13 2009, 10:45 PM BST
It's scaremongering to think that what is produced in the lab under controlled conditions is more of a concern than what nature makes.
In the 'lab' and 'controlled conditions' are the keywords here. But these products aren't intended to stay in the labs. what happens outside the lab without controls? Look at all the drugs that seemed safe in the labs and the way they wrecked lives. Those drugs could be recalled. Rogue genes can't.
For scientists to suggest something is safe in the lab, therefore must be safe in the real world, is arrogance and idiocy combined. We're fools in lab coats wearing blinkers and crossing our fingers.
And just because they're tiny pieces of DNA doesn't mean the associated risk is correspondingly tiny either.
And one of my favourite Joe Jackson songs for Tim. The words are very drole and apt. http://www.youtube.com/watch?v=UYIUYzbYeKA