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Author Topic:   Example of Recent Rapid Selection in Humans
Percy
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Posts: 22392
From: New Hampshire
Joined: 12-23-2000
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Message 1 of 6 (567591)
07-01-2010 8:11 PM


From today's New York Times: Scientists Cite Fastest Case of Human Evolution
--Percy

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hooah212002
Member (Idle past 802 days)
Posts: 3193
Joined: 08-12-2009


Message 2 of 6 (567593)
07-01-2010 8:37 PM
Reply to: Message 1 by Percy
07-01-2010 8:11 PM


I thought about this while watching "Everest: Beyond the Limit" on the Discovery channel, in regards to the Sherpas. I'm not sure if it is related though, since your article mentions Tibetans.

"A still more glorious dawn awaits
Not a sunrise, but a galaxy rise
A morning filled with 400 billion suns
The rising of the milky way"
-Carl Sagan

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Bolder-dash
Member (Idle past 3630 days)
Posts: 983
From: China
Joined: 11-14-2009


Message 3 of 6 (568082)
07-04-2010 9:34 AM
Reply to: Message 1 by Percy
07-01-2010 8:11 PM


I think this begs the question, how quickly would there have to be evidence of biological changes spreading throughout populations of people for most evolutionists to finally concede that these things are happening too fast for random mutations and natural selection to be the cause? 1000 years? 500 years? 20 years?
At what point do you finally say, now wait a second, I can't see 30 genes getting exactly the right mutations which could be useful for increasing altitude adaptation surviving through natural selection choices, and out-competing all other genetic varieties in such a short time? Is there any number that all honest people must say-ok, something else is definitely going on here?

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Theodoric
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Posts: 9076
From: Northwest, WI, USA
Joined: 08-15-2005
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Message 4 of 6 (568129)
07-04-2010 12:08 PM
Reply to: Message 3 by Bolder-dash
07-04-2010 9:34 AM


Something going on?
Maybe if you want to let us know what you mean by "something is going on", then we could answer in a thought out, rational manner.

Facts don't lie or have an agenda. Facts are just facts

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Michael
Member (Idle past 4638 days)
Posts: 199
From: USA
Joined: 05-14-2005


Message 5 of 6 (568145)
07-04-2010 1:53 PM
Reply to: Message 3 by Bolder-dash
07-04-2010 9:34 AM


Bolder-dash writes:
At what point do you finally say, now wait a second, I can't see 30 genes getting exactly the right mutations which could be useful for increasing altitude adaptation surviving through natural selection choices, and out-competing all other genetic varieties in such a short time?
From the article:
quote:
The Beijing team analyzed the 3 percent of the human genome in which known genes lie in 50 Tibetans from two villages at an altitude of 14,000 feet and in 40 Han Chinese from Beijing, which is 160 feet above sea level. Many genes exist in a population in alternative versions. The biologists found about 30 genes in which a version rare among the Han had become common among the Tibetans. The most striking instance was a version of a gene possessed by 9 percent of Han but 87 percent of Tibetans.
My bold.
It appears that those alleles were already present in the population. If so, this is just selection occurring over ~150 generations.
This should not be a big deal for creationists. It's not as if the dog kind suddenly became the cat kind.
Cheers.

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jar
Member (Idle past 394 days)
Posts: 34026
From: Texas!!
Joined: 04-20-2004


Message 6 of 6 (568146)
07-04-2010 1:56 PM
Reply to: Message 5 by Michael
07-04-2010 1:53 PM


It's not even speciation.
It is though a great example of Natural Selection in action.
Edited by jar, : hit key too soon

Anyone so limited that they can only spell a word one way is severely handicapped!

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