phillip smith <[email hidden]> wrote:
: Tim Tyler at [email hidden] wrote on 9/16/03 2:11 AM:
:> The Engineered Future
:> =====================
:>
:> In this essay I express my conviction that eventually organisms will come to have engineered
:> genomes.
:>
:> As the references of this essay indicate, there are quite a few others with similar views out
:> there - this essay publicly adds my name to the list.
:>
:> --> alife.co.ukengineered futureOpen ↗ <--
:
: I have quickly read this article an would like to find the following comments
: Engineering versus evolution
: You seem to suggest that engineering is in some way "better" than evolution and that genomes will
: be engineered.
Yes - evolution /without/ engineering (what we have mostly seen so far) is missing a critically
important tool - and will proceed much more slowly as a consequence.
recombination - both engineering and recombination facilitate the more rapid formation of new
organisms - and the effects of both are dramatic and far-reaching.
: I would like to take issue with this. Engineering is pretty young and has achieved quite a lot. It
: has in now way produced artifacts of its process of a complexity that has in anyway approached the
: complexity of the biological artifacts of the evolutionary process.
Debatable. Probably have a case for genetic engineering - but for other sorts of engineering, the
notion seems rather questionable.
You can buy the human genome on a single CD ROM these days. That makes modern organisms complex -
but not *that* complex compared with other man-made objects.
The engineering approach is not shy of producing complex or sophisticated objects.
: "Now that human beings have arrived on the scene, new possibilities have opened up for making new
: organisms.
: In particular, design and engineering can now be employed."
: Is this true. What new organisms have we made or could we make. As far as I know we have not got
: any closer to the de novo synthesis of organism. All we have been able to do is introduce specific
: mutations into the genomes of some organisms.
That's all I was intending to refer to there. "New organisms" was intended to refer to new sorts of
creatures - e.g. new species or strains
- not the synthesis of a totally new sort of living organism from scratch.
: "Similarly recombination will no longer be a process of finding a mate and mixing their genes with
: your own. Instead, the entire biosphere will be a potential reserve of useful genes which might
: prospectively be employed. Nor need one creature be picked as a mate - instead genes from any
: number of creatures could be used."
: This is suggests we have some understanding of what genes we want to incorporate.
Or will gain such understanding, yes.
I *suppose* you would still get somewhere if you picked genes at random from the organism with the
protein you are looking for, and mixed them into your target genome - so knowledge of the genetic
structure is not logically necessary - but it certainly does help.
: Considering introducing genes from one population to another often has unexpected effects what
: make you think that we would no how to create the phenotypes we want by picking and mixing lengths
: of nucleic acid from different species. These genes may have a completely different meaning out
: side the context of there genomes.
Sometimes - but it would be foolish to argue that human understanding of genetics is so bad, and
will stay so bad that we will never be able to do any better than making random changes. We
regularly do much better than that today - and our abilities in the area are improving rapidly as
our understanding increases.
: Genetic engineering is just another source of mutation and has been a spectacular failure when
: compared to simple selection. It has and will continue to make us aware of how complex powerful
: selection is.
Genetic engineering is not "just another source of mutation".
It is systematically different from the sources of mutation that have existed in nature until now -
since the mutations are directed by intelligent agents.
Intelligent agents can perform a range of operations which are beyond the reach of the conventional
breeder using selection. For example, they can easily do things such as transfer entire genes across
species barriers - even if the species are not closely related.
I don't really think the tremendous power of the technique can be seriously questioned. Genetic
engineering offers the possibility of transforming life on the planet - probably out of all
recognition.
The main questions surrounding genetic engineering are over what we should do with this power - not
about whether it exists or not.
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