Skip to comments.Tibetans Evolved to Survive High Life, Study Says
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.
A Tibetan father and son on a pilgrimage around China's Mount Kailas.
They didn’t evolve. They adapted!
Miller Brewing Company is formulating a response to the headline! ; )
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.
Natl Geo is a lib outfit.
How do they compare to people who live in the high Andes mountains in Peru and Bolivia?
Potala palace is one of the most impressive sites that I’ve
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.
Do I see Chuck Taylors?
Do you have any cites for what you assert here? I would like to know more details.
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?
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.
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.....