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Evolution can occur quickly and change how populations interact [Lab demonstration]
Cornell University ^ | 03 July 2006 | Susan Lang

Posted on 07/10/2006 11:21:37 AM PDT by PatrickHenry

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To: RobRoy; Ichneumon
Because simply favoring an existing trait vs. coming up with something that never existed before are two completely different things.

Yeah. But the difference between the former and the later doesn't make studying the former illegitimate or uninteresting. Besides, we already know that new traits can arise by evolution. E.g. (links swiped from Ichneumon here, see also the next post):

Directed evolution of biosynthetic pathways. Recruitment of cysteine thioethers for constructing the cell wall of Escherichia coli

Directed evolution of a type I antifreeze protein expressed in Escherichia coli with sodium chloride as selective pressure and its effect on antifreeze tolerance

Molecular evolution of an arsenate detoxification pathway by DNA shuffling

Long-term experimental evolution in Escherichia coli. XIII. Phylogenetic history of a balanced polymorphism

Rates of DNA sequence evolution in experimental populations of Escherichia coli during 20,000 generations

The evolutionary origin of complex features

Contribution of individual random mutations to genotype-by-environment interactions in Escherichia coli

Rapid phenotypic change and diversification of a soil bacterium during 1000 generations of experimental evolution

Bacterial evolution and the cost of antibiotic resistance

The ecology and genetics of fitness in Chlamydomonas. IX. The rate of accumulation of variation of fitness under selection.

Mild environmental stress elicits mutations affecting fitness in Chlamydomonas

The emergence and maintenance of diversity: insights from experimental bacterial populations

Direct Estimate of the Mutation Rate and the Distribution of Fitness Effects in the Yeast Saccharomyces cerevisiae

Pleiotropic effects of beneficial mutations in Escherichia coli

The Rate of Compensatory Mutation in the DNA Bacteriophage X174

Mutation-selection balance accounting for genetic variation for viability in Drosophila melanogaster as deduced from an inbreeding and artificial selection experiment

Genetic restriction of HIV-1 infection and progression to AIDS by a deletion allele of the CKR5 structural gene

Complete Rescue of Lipoprotein Lipase–Deficient Mice by Somatic Gene Transfer of the Naturally Occurring LPLS447X Beneficial Mutation

Evolution and Information: The Nylon Bug

Spontaneous mutations in diploid Saccharomyces cerevisiae: more beneficial than expected

Nonuniform concerted evolution and chloroplast capture: heterogeneity of observed introgression patterns in three molecular data partition phylogenies of Asian Mitella (saxifragaceae)

Evolutionary analysis of genetic variation observed in citrus tristeza virus (CTV) after host passage

Examples of Beneficial Mutations and Natural Selection

Genetic Variant Showing a Positive Interaction With ß-Blocking Agents With a Beneficial Influence on Lipoprotein Lipase Activity, HDL Cholesterol, and Triglyceride Levels in Coronary Artery Disease Patients

Genetic restriction of HIV-1 infection and progression to AIDS by a deletion allele of the CKR5 structural gene

Evolution of new information

Spontaneous mutations in diploid Saccharomyces cerevisiae: more beneficial than expected

Are Mutations Harmful?

Evolution and Information: The Nylon Bug

Directed evolution of human estrogen receptor variants with significantly enhanced androgen specificity and affinity

Multiple duplications of yeast hexose transport genes in response to selection in a glucose-limited environment

Complete Rescue of Lipoprotein Lipase–Deficient Mice by Somatic Gene Transfer of the Naturally Occurring LPLS447X Beneficial Mutation

Punctuated evolution caused by selection of rare beneficial mutations.

PLEIOTROPIC EFFECTS OF BENEFICIAL MUTATIONS IN ESCHERICHIA COLI

The Distribution of Fitness Effects Among Beneficial Mutations


61 posted on 07/10/2006 1:06:22 PM PDT by Stultis (I don't worry about the war turning into "Vietnam" in Iraq; I worry about it doing so in Congress.)
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To: RobRoy
Because simply favoring an existing trait vs. coming up with something that never existed before are two completely different things.

Pardon me if I ask a question. If mutations are not responsible for population diversity, and if everything is descended from two of its kind, one male, one female, that rode on Noah's Ark, then where did all the population diversity come from?

62 posted on 07/10/2006 1:09:57 PM PDT by HayekRocks
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To: CarolinaGuitarman

Indeed you're right. The pigeon family encompasses many species, all over the world. So much for that argument, eh?

A guy can see photos of lots of different pigeon species at the link below:

http://www.camacdonald.com/birding/Sampler3-PigeonsDoves.htm


63 posted on 07/10/2006 1:11:10 PM PDT by MineralMan (non-evangelical atheist)
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To: HayekRocks

"If mutations are not responsible for population diversity, and if everything is descended from two of its kind, one male, one female, that rode on Noah's Ark, then where did all the population diversity come from?"




Err...uh....well...let me see...

Wait, I'm going to go to answersingenesis.com. I'm sure they know there.


64 posted on 07/10/2006 1:13:02 PM PDT by MineralMan (non-evangelical atheist)
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To: Lexinom
And the funny thing is... no matter how "far out" the breeding went, subsequent generations always returned to the archetype

So the city pigeons we have here in Florida should all look like wild pigeons.

But they do not. There are white pigeons, and calico pigeons, and brown pigeons, and many other types of pigeons. Why have they not returned to the archetype?

65 posted on 07/10/2006 1:13:25 PM PDT by HayekRocks
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To: MineralMan

And here are a list of pigeon species, an the genera they are part of (there is more than one genus):

http://www.wildlifelands.com/wxs/Taxon4.htm#60

In all over 200 species.


66 posted on 07/10/2006 1:14:43 PM PDT by CarolinaGuitarman (Gas up your tanks!!)
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To: MineralMan
Wait, I'm going to go to answersingenesis.com.

I hear they are really, really backed up. I think a lot of creationists get asked questions like mine and are stumped, so they go to answersingenesis to learn what Biblical Truth is. I thought you were supposed to be able to figure this out from reading the Bible yourself. At least, thats what Protestants tell Catholics. But it seems some of them have to consult Authorities too.

67 posted on 07/10/2006 1:19:02 PM PDT by HayekRocks
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To: CarolinaGuitarman

Well, now. 200 species of pigeon, eh? Hmm...that's a lot, for sure.

I guess that person was wrong about pigeons, huh?


68 posted on 07/10/2006 1:20:09 PM PDT by MineralMan (non-evangelical atheist)
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To: HayekRocks

Are they not the same species? Can jews not have sex with palestinians and produce offspring?


69 posted on 07/10/2006 1:21:12 PM PDT by RobRoy (The Internet is doing to Evolution what it did to Dan Rather. Information is power.)
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To: HayekRocks

Are they not the same species? Can jews not have sex with palestinians and produce offspring?

Like I said, evolution is like rust. It is what is happening to the old car out in a field, but it is not what created it, nor is it's condition superior to before it was parked there.


70 posted on 07/10/2006 1:22:01 PM PDT by RobRoy (The Internet is doing to Evolution what it did to Dan Rather. Information is power.)
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To: HayekRocks

Uh...I'm being a bit facetious, you see. See my tagline.


71 posted on 07/10/2006 1:22:23 PM PDT by MineralMan (non-evangelical atheist)
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To: Stultis

Jeez, not THIS spam again.


72 posted on 07/10/2006 1:23:45 PM PDT by RobRoy (The Internet is doing to Evolution what it did to Dan Rather. Information is power.)
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To: RobRoy

"Like I said, evolution is like rust. It is what is happening to the old car out in a field, but it is not what created it, nor is it's condition superior to before it was parked there.
"

Uh...that argument won't wash, there, RobRoy. Cars are not alive. They don't breed and reproduce other cars.

Just in case you hadn't heard, animals like humans don't do too well as individuals. They tend to rot after their dead. It's amazing, huh?

It's that living part that puts the kaibosh on your little explanation. While animals are alive, they heal from illness, reproduce by making new animals, and generally improve with age to some degree.

Once they die, though, all that's over, and they soon rot, or are eaten by other animals.

Your simile is baseless, I'm afraid. Back to the drawing board you go.


73 posted on 07/10/2006 1:26:55 PM PDT by MineralMan (non-evangelical atheist)
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To: MineralMan

I'm thinking of the car as representing the species, not the individual. But you are right. If an analogy is perfect, it becomes the thing itself.

Let me be clear. I firmly believe in evolution - DE-evolution. But evolution is not what made the individual types of biological machines. It is what happened to them after they were created.


74 posted on 07/10/2006 1:29:26 PM PDT by RobRoy (The Internet is doing to Evolution what it did to Dan Rather. Information is power.)
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To: RobRoy

Evolution is not rust, and it does produce fitter organisms in response to environmental change.

http://www.freerepublic.com/focus/f-news/1634489/posts


75 posted on 07/10/2006 1:30:39 PM PDT by js1138 (Well I say there are some things we don't want to know! Important things!")
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To: RobRoy

Sure they are the same species. But within any species there is a lot of variation. If the variation was not caused by mutation, where did all the variation come from? If there was one pair of dogs on the Ark, then where did all the many different dog breeds, that make the Westminster Dog Show possible, come from?


76 posted on 07/10/2006 1:32:17 PM PDT by HayekRocks
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To: MineralMan

Thank you for telling me. I am not good at telling when someone is facetious.


77 posted on 07/10/2006 1:33:28 PM PDT by HayekRocks
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To: RobRoy

"Are they not the same species? Can jews not have sex with palestinians and produce offspring?

"

Aren't all WHAT the same species. All humans can mate and produce offspring. They are of the same species. There is no real difference biologically between, say, Jews and Palestinians. Indeed, they come from the same place, and are, essentially identical. Yet, any human can mate with any other human, since they are all of the same species.

Humans, however, cannot mate with chimpanzees and produce offspring, despite the close genetic similarity between these two species. And chimpanzees cannot mate and reproduce with gibbons, either, or any of the other primate species. Do you have any idea how many species of primates there are...and that's just primates?

Danged big ark that must have been. Even just having a mating pair of all the primates would have pretty much filled it up, when you consider food and water and the like. 300 cubits isn't all that long a boat, really.

The Ark's a nice story, though. It's a nice cautionary tale. Do what the deity says or something bad will happen. See what happened back in Noah's day? Play nice, children, or something like that might happen to you.

Oh, no...no more floods, though. See that rainbow? Yeah...the next time it'll be fire or something, so you'd better act right and behave.

Now, let me tell you the story of Lot. That's another example of what happens when you're bad.


78 posted on 07/10/2006 1:34:12 PM PDT by MineralMan (non-evangelical atheist)
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Lots of nice links ping


79 posted on 07/10/2006 1:35:40 PM PDT by 2nsdammit (By definition it's hard to get suicide bombers with experience.)
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To: HayekRocks

"Thank you for telling me. I am not good at telling when someone is facetious."




Not a problem. You'll often find me in these threads. I'm an atheist. I believe that evolution is how speciation occurs. Anything I write should be interpreted based on that.

Since these threads convince nobody of anything, I often find myself in facetious mode in them. There are some really, really silly things said in these threads. I mean...seriously silly.


80 posted on 07/10/2006 1:38:09 PM PDT by MineralMan (non-evangelical atheist)
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