Monday, May 4, 2009

CM PRESS # 684

BEFORE WE BRANCHED OFF
Reconstruction of what first Europeans may have looked like.

Here's what we've written before about the first Europeans (Issue # 683 and other columns).

Scientists now believe that a tiny mutation in gene slc24a5, located on the long leg of chromosome 15 at position 21.1, started in the few people who left Africa and headed into Europe about 20,000--50,000 years ago was a major factor in making their skin white and thus allowing a greater production of Vitamin D, which in turn prevented rickets.This mutation became the norm in Europe 5,300 to 12,000 years ago.

This gene has primary alleles that differ in only one nucleotide, changing the 111th amino acid from alanine to threonine.In other words, a mistake in copying happened (that's what a mutation is) that replaced the A with a T in this gene slc24a5 located on the long leg of chromosome 15 at position 21.1 and the result was white people.

Usually, such mutations are swallowed back up in the original population and disappear.In this case, however, the white skin gave a survival advantage and it spread in Europe since those with it didn't get rickets and thus lived longer to breed more like themselves while those without the mutation eventually died off.In White European descended peoples, the threonine form is found in from 98.7% to 100% of the population while in Africans, East Asians and American Indians from 93% to 100% of the populations have the alanine form.

When you change one gene, other things often change that may or may not have any survival benefit, but which remain because of their link to the first change. Soon, there may be a whole cascade of changes as genes do not operate in a vacuum. Over time, and if isolation is involved, one type diverges more and more from the old norm as it adapts to different conditions.

In addition to white skin, many other characteristics developed. Some were random mutations that stuck, and others were, as is white skin, adaptations for the new climate. For example, thin, longer noses with smaller nostrils are an advantage in cold weather because they heat the air breathed in before it goes to the lungs.
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REMEMBER HOW WE'VE BEEN TOLD THAT WE HAVE TO HELP DEVELOPING NATIONS SO WE'LL ALL PROSPER AND WE'LL ALL GET ALONG?
That's not the way nature works.
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RUST BELT EMPTIES--SYMPTOM OF SICK WORLD VIEW
We need to re-industrialize the US and actually start making things again.
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DIMWITS IN STUPID PARTY STILL DON'T GET IT
The reason people are fleeing the GOP is because of the Bush family and their neocon pals with their stupid policies.

George I was stupid and had stupid policies. George II was even worse and is responsible for killing about 5,000 young Americans in a war in Iraq that wasn't needed.

Now, Iraq is destabilized--since we killed the only guy who was keeping it stable, Saddam Hussein--and will become an Islamic Republic once the US leaves.

Then, there's the Bush torture. And, don't forget the years of the stupidest, most transparent propaganda trying to justify all the stupidity.

There is some hope for the Stupid Party, however, because Obama is starting to make some of the same mistakes but with Afghanistan.

Here's what the dimwits in the Stupid Party are now doing.
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Those are our opinions. Thanks for reading them.

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