Even if they mate with someone who doesn’t have Downs? And if it’s with someone that does have Downs, does the mutation get reinforced? Two generations later, does a person with one Downs grandparent have any detectable genetic anomaly?
Creationists are fond of equilibrium thermodynamic systems where disorder always increases.
Fortunately for the rest of us, life on earth exists in an environment which is far from equilibrium. Under these conditions, information content can spontaneously increase, with the formation of dissipative structures.
Ilya Prigogine’s 1977 Nobel lecture (pdf) covers the topic in greater detail than I remember offhand.
Without knowledge of this type of behavior, creationist are left floundering at the apparent disconnect between thermodynamics and evolution.
If Dawkins were stumped it wouldn’t make him wrong about evolution.
Are creationists wrong because they can’t (or refuse) to answer who created the place for God to be? A Being needs a place to exist if it isn’t in exsistence then it is nowhere.
Monavis
I’m sorry…explain to me again why people choose to argue with creationists?
Creationism is an illogical theory that requires no proof and has no scientific basis. Evolution, OTOH, IS a scientific theory so any gaps or inconsistancies due to our incomplete understanding of the it basically gives Creationists all the evidence they need to believe they are right.
He wasn’t stumped by the question - he was stumped wondering what to do with the creationists who had just tricked him into an interview.
Gene duplication is the obvious mode by which “information” (god I hate that word) is added to the genome. Happens all the time. A complete gene duplication happened at the base of the vertebrate lineage, it happened again at the base of the teleost (bony fish) lineage. Gene duplication relieves selective pressure on essential genes, allowing them to diverge from their original function. It’s really as simple as that. Is that in and of itself a mutation? It doesn’t fucking matter.
I saw Philip Johnson give a talk once. I gave him Hox gene duplication as an example of information gain. His reply was: well you’ve just duplicated something that’s already there, no function has been added. Then onto the next question. He was unwilling to see the next obvious step–if I make a photocopy of a document, then change words in the document so that it is a completely different document, hasn’t information been added by this process?
This line of argument is completely disingenuous.
The way I see it, he would be right in asserting that not much new information had been added by simply duplicating a gene.
Now if you want to explain how you can get from that minimal amount of new information, to something significant, you need to go back to the mathematical definition of information.
Simply duplicating that one gene allows mutations in one copy without affecting the survivability of the creature. Now you can play around with the copy, making random changes to it. If you take something ordered and make random changes, the newly-changed gene will very likely contain more information than the original, according to the mathematical definition of information. Every once in a while, one of these random changes will actually be useful and will be more likely to get propagated. When it does, you have a creature with added information.
IOW, in my view, it’s not the gene duplication that adds information, the duplication just sets up a situation where information can get added by random mutations.
The funniest example I ever saw of this was titled “Creationist almost discovers the sun” on some of the sites that linked to it. the original forum post happened here:
Yeah, but that’s my point. It’s a trivial objection. The entire mechanism for information gain is in place and describable. If you focus on “mutation” alone (and lets just narrow it down to single nucleotide polymorphisms since everyone likes to ignore the additions, deletions, microsatellite slippage, inversions, and translocations that invariably occur), like some kind of moron, then sure, I guess information isn’t added.
It just makes me angry.
Because you were tricked into it, as Dawkins says he was in the intro to the article he wrote in response to this video being published.
Again, a propensity for wordiness hurts him here, but I didn’t really find a good place to chop it for space.
Enjoy,
Steven
Well, any evolutionary zoologist worth this salt should know what to do about that; you release the hordes of genetically modified, laser-guided curare-venom-dispatching wasps at them any dance a jig while shouting, “How’s that for a plague, Fundie maggots! Let’s see your god do that!”
Geez, I have to think of everything? Dawkins is a bright fellow; I’d expect him to one-up me on that.
Stranger