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Tibetans Evolved to Survive High Life, Study Says
nationalgeographic ^ | May 13, 2010 | John Roach

Posted on 05/16/2010 8:07:24 AM PDT by JoeProBono

Most Tibetans are genetically adapted to life on the "roof of the world," according to a new study.

The Tibetan Plateau (map) rises more than 13,000 feet (4,000 meters) above sea level. At such heights, most people are susceptible to hypoxia, in which too little oxygen reaches body tissues, potentially leading to fatal lung or brain inflammation.

To survive the high life, many Tibetans carry unique versions of two genes associated with low blood hemoglobin levels, the researchers found.

Since hemoglobin is the oxygen-carrying component of red blood cells, the find might seem "really counterintuitive," said study leader Tatum Simonson at the University of Utah's Eccles Institute of Human Genetics in Salt Lake City.

"Usually, if you or I or any nonadapted person went to high altitude, we would increase our hemoglobin levels to compensate for the low amount of oxygen."

But high hemoglobin levels have been linked to complications such as hypertension and chronic mountain sickness, Simonson said.

These negative effects could have led to a genetic mutation among Tibetans that "prevented them from making as much" hemoglobin, she noted.


TOPICS: Science; Travel
KEYWORDS: genes; jpb; tibet; tibetans

A Tibetan father and son on a pilgrimage around China's Mount Kailas.


1 posted on 05/16/2010 8:07:25 AM PDT by JoeProBono
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To: JoeProBono

They didn’t evolve. They adapted!


2 posted on 05/16/2010 8:09:23 AM PDT by Jack Hydrazine (?)
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To: Jack Hydrazine

Miller Brewing Company is formulating a response to the headline! ; )


3 posted on 05/16/2010 8:16:38 AM PDT by Northern Yankee (Where Liberty dwells, there is my Country. - Benjamin Franklin)
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To: JoeProBono
Yeah. And?

An article like this is an excellent example of the dishonesty of the Darwinists. The Tibetans exhibit micro-evolution or adaptation. They are still quite human. There has been no macro-evolution or speciation. Pretending that there is any scientific link between adaptation and speciation is very strange science indeed.

ML/NJ

4 posted on 05/16/2010 8:17:09 AM PDT by ml/nj
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To: ml/nj

Natl Geo is a lib outfit.


5 posted on 05/16/2010 8:20:35 AM PDT by Frantzie (McCain=Obama's friend. McCain/Graham = La Raza's Senators)
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To: Northern Yankee

6 posted on 05/16/2010 8:31:05 AM PDT by Hillbillary (I know how to deal with Communists, I still wear their scars on my back from Hollywood-Ronald Reagan)
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To: JoeProBono

How do they compare to people who live in the high Andes mountains in Peru and Bolivia?


7 posted on 05/16/2010 8:33:14 AM PDT by DuncanWaring (The Lord uses the good ones; the bad ones use the Lord.)
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To: JoeProBono

Potala palace is one of the most impressive sites that I’ve
ever seen.

.

ve


8 posted on 05/16/2010 8:35:11 AM PDT by Dr. Ursus
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To: Hillbillary

The only beer for Tibetans!
9 posted on 05/16/2010 8:39:31 AM PDT by Jack Hydrazine (?)
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To: ml/nj
Don't count on it ~ for all you know "real" Tibetans don't breed with the lesser species.

Now, for the cold, hard facts ~ hemaglobin is a product of the action of several different genes. First you need to have heme produced. It comes in two forms ~ left handed and right handed. Not all human beings make both forms ~ there are mutant varieties that make only one type! The original humans excrete the type of heme they don't need to keep around for the production of hemaglobin.

Currently there are only a few hundred of these "original" types around ~ in Scandinavia. There are several thousand of their relatives in the United States. Many of them experience some degree of indeterminate infertility when they attempt to breed with other species of humans.

Compounding the picture there turn out to be 82 different alleles of the critical gene for manufacturing heme, and some of the other variations are so incompatible with each other than fertile offspring are not possible or are exceedingly rare.

Again, this is just one gene with 82 different forms ~ and you can end up with what amounts to speciation.

10 posted on 05/16/2010 8:44:59 AM PDT by muawiyah ("Git Out The Way")
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To: JoeProBono

bookmark


11 posted on 05/16/2010 8:45:26 AM PDT by GOP Poet (Obama is an OLYMPIC failure.)
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To: Jack Hydrazine

12 posted on 05/16/2010 8:48:44 AM PDT by JoeProBono (A closed mouth gathers no feet)
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To: JoeProBono

Do I see Chuck Taylors?


13 posted on 05/16/2010 8:48:45 AM PDT by ▀udda▀udd (7 days - 7 ways Guero >>> with a floating, shifting, ever changing persona.....)
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To: Hillbillary

Perfect ~


14 posted on 05/16/2010 8:52:30 AM PDT by Northern Yankee (Where Liberty dwells, there is my Country. - Benjamin Franklin)
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To: ├čudda├čudd

15 posted on 05/16/2010 8:52:57 AM PDT by JoeProBono (A closed mouth gathers no feet)
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To: muawiyah
Currently there are only a few hundred of these "original" types around ~ in Scandinavia. There are several thousand of their relatives in the United States. Many of them experience some degree of indeterminate infertility when they attempt to breed with other species of humans.

Do you have any cites for what you assert here? I would like to know more details.

ML/NJ

16 posted on 05/16/2010 9:05:33 AM PDT by ml/nj
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To: muawiyah

17 posted on 05/16/2010 9:07:58 AM PDT by JoeProBono (A closed mouth gathers no feet)
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To: ml/nj
Hmmm ~ try Intermittent Scandinavian Porphyria ~ in fact, just take a good look at the topic "porphyria" and take a look at what many of them have as "symptoms".

A dozen of the different alleles are also present in folks with various sorts of thyroid trouble ~ and that, in turn, is a product of alleles out of the norm (or average).

These variations are not of recent origin. They've been around for thousands of years.

There are THOUSANDS of reports on these matters available on the internet. Look for the ones published by researchers in Finland and/or Sweden.

Liver function is pretty fundamental, but humans have 82 different alleles for this fundamental activity. What does it take for specieation?

18 posted on 05/16/2010 9:37:07 AM PDT by muawiyah ("Git Out The Way")
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To: muawiyah

Call it speciation or self-defense, but it’s an interesting concept when a group of humans have evolved a genetic profile that allows them, and only them, to live in a certain location. When other types of humans are apt to die quickly if they arrive in this location, it matters little whether they came to reproduce with the natives or to conquer them — they ain’t gonna be able to do either one.


19 posted on 05/16/2010 10:00:38 AM PDT by GovernmentShrinker
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To: JoeProBono

THanks posting the pics.

#3, MAn, boy and horse.

Is that an “in the white” Mosin Nagant?

If so, must be proof that they are almost everywhere. Those pesky Russians.....


20 posted on 05/16/2010 10:13:06 AM PDT by ASOC (Things are not always as they appear, ask the dog chasing the car)
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To: muawiyah
just take a good look at the topic "porphyria" and take a look at what many of them have as "symptoms".

Well, I did as you suggested. Here's how Wikipedia starts:

The acute, or hepatic, porphyrias primarily affect the nervous system, resulting in abdominal pain, vomiting, acute neuropathy, muscle weakness, seizures, and mental disturbances, including hallucinations, depression, anxiety, and paranoia. Cardiac arrhythmias and tachycardia (fast heart rate) may develop as the autonomic nervous system is affected. Pain can be severe and can, in some cases, be both acute and chronic in nature. Constipation is frequently present, as the nervous system of the gut is affected, but diarrhea can also occur.
You probably could just as well have pointed me to any genetic disorder. I see nothing here about whether people with this disorder, or really more importantly their descendants if they have any, are limited to breeding with others who have the same disorder. I think you probably know what I am after. Why don't you provide a couple of specific links to articles that provide support for the point you wish to make.

ML/NJ

21 posted on 05/16/2010 10:21:06 AM PDT by ml/nj
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To: ASOC
Looks like


22 posted on 05/16/2010 10:32:05 AM PDT by JoeProBono (A closed mouth gathers no feet)
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how’s the tv reception up there? are they dish, cable? /s


23 posted on 05/16/2010 10:42:44 AM PDT by isom35
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To: ASOC

Probably a chinese made one.


24 posted on 05/16/2010 10:58:05 AM PDT by morkfork (Candygram for Mongo)
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To: morkfork

AH - A type 53?


25 posted on 05/16/2010 11:14:43 AM PDT by ASOC (Things are not always as they appear, ask the dog chasing the car)
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To: ml/nj
Acute intermittent porphyria (AIP) would be a better search element.

One of the first things I noticed on doing a search on this topic today is that there's a NEW ONE ~ it says that a recent survey found HUNDREDS of different genes behind this problem in Scandinavia.

That's up from the 82 a few years back, or the 3 known 10 years ago.

No, this genetic difference is "special". The list of symptoms you found in Wiki doesn't begin to cover the situation ~ not at all ~

26 posted on 06/19/2010 5:16:32 AM PDT by muawiyah
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To: muawiyah
More than a month now and still no links to specific articles; you just suggest I keep on searching. No thanks.

ML/NJ

27 posted on 06/19/2010 5:31:00 AM PDT by ml/nj
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To: ml/nj

There are about lebenteenzillion “links” ~ if you have some ideological problem with using www.google.com to do the search, then using some other search engine. You’ll get the same results.


28 posted on 06/19/2010 5:34:58 AM PDT by muawiyah
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