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Reeling in the gene that makes Caucasians white
[Originally from The Times, reprinted in The Australian newspaper Dec 17, 2005]

LONDON: A newly identified gene that humans share with fish has been found to help explain why white people have pale skins.

Scientists in the US have discovered that a tiny mutation in a gene plays a key role in determinating skin colour, with Caucasians inheriting a different version from other racial groups.

While it is known that colour is genetically determined, this is the first research to pinpoint a particularly stretch of DNA that underlies normal differences in human pigmentation.

The findings promise new insights into cancer and other diseases influneced by genes and shed light on the eevolution of different hues of skin. The discovery of the gene, named slc245a5, has emerged from research into cancer that used zebrafish as an animal model.

A team led by Keith Cheng, of Pennsylvania State University, noted that a varieant of the fish, known as "golden", had paler markings than usual, and that this lighter pigmentation was caused by a mutation in slc245a5. As the gene is known to exist in people, Dr Cheng wonderred whether it might be reponsible for some of the variation in human skin colour.

First he transplanted the human gene into fish and found that it had the same effect on pigmentation. He then teamed up with a colleague, Mark Shriver, to investigate ho different versions of the gene were distrubted across human populations, using the recently completed HapMap, which charts genetic variation.

The researchers have found that while people of African and Chinese origin carry on version of slc245a5, those of white European ancestry have a different one. The results, published in the journal Science, strongly indicate a big influence over skin colour.

The work suggests that the dark version of the gene occurs as a default, and that the light variant is a mutation that probably evolved as humans moved out of Africa and migrated into northern latitudes. This supports a theory that lighter skin evolved as an adaptation to the weaker sunlight of northern climes.

Sunlight is essential for the body to manufacture vitamin D, and pale skins make this easier when the sun's rays are not particulary strong. The slc245a5 gene does not vary between Africans and much lighter-skinned Chinese, or between Europaeans of Swedish and Greek ancestry.

It is thought to be responsible for between 25 and 38 per cent of colour variation between Europeans and Africans, and other genes are certain to be involved.

While genes that are mutated in albino people have been identified, this is the first that has a major influence on normal variations. The results may assist research into malignant melanona, the deadliest skin cancer, which is rarer among dark-skinned people.

They should also help scientists seeking to tease out the genetic contribution to conditions such as heart disease and diabetes, which are often influenced by multiple genes.
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<small>"Follow the grain in your own wood.” ~ Howard Thurman</small>
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quote:
What makes caucasians white?


i jave been branded numpty, stupid and other names. please can anyone tell me what is going on here, the question "What makes caucasians white" asks one Australian girl, I am not going to call you names, i know and you know can come up with sum better.

cauucasian is another name for a white person. lets move on to better subjects, am i not a student?
I posted this article coz it was recent. The theory of human migration is not new itself, just the discovery/testing of this gene.

I just present information - I don't put any spin on it. It's up to the individual to assess the information as they sit fit to read further or ignore.

Posting information on the internet is not validating it. Academics, researchers and historians do that job.

Obviously the above poster knows all this info already - good for you. I didn't, and maybe someone else might not know it either.

It's as simple as that. Roll Eyes

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quote:
Originally posted by art_gurl:
I posted this article coz it was recent. The theory of human migration is not new itself, just the discovery/testing of this gene.

I just present information - I don't put any spin on it. It's up to the individual to assess the information as they sit fit to read further or ignore.

Posting information on the internet is not validating it. Academics, researchers and historians do that job.

Obviously the above poster knows all this info already - good for you. I didn't, and maybe someone else might not know it either.

It's as simple as that. Roll Eyes

.


I'm sorry. Maybe you misunderstood me. I was not being sarcastic. I was not aware of the information that you posted. My thanks were sincere.
Dear Art-girl,
My understanding of the difference in the pigmententation btw the various racial groups lies in the relative amounts of melanin in the melanocytes that lie in the skin. It has been said that everyone has the same number of melanocytes (melanin producing cells) but the ones in darker complexioned folks produce more of the dark pigment melanin...which in my opinion would confirm the commonality of man as one race and the varying amounts of melanin being reflective of the region from which a particular person or his/her roots may hail from.
Okay guys; This Genetic variation grows from the need for Vitamin D--the more solar you get, the more you produce. So, a person living near the equator gets more sun, and someone living around the Caucasus mountains gets less sun"”to produce more vitamin D, those people who got less sun didn't need the blocking provided by melanin.

So they adapted paler skin. Just as Asians adapted to their environment, and the Africans, Island peoples and Inuit Indians and so on. This is what Humans do. Can you imagine what will happen when we finally start colonizing other worlds?
Actually, "Caucasoid" is a broad geographico-ethnic category that includes many people (not just Whites). The original Caucasoids were Central Asians, Semites and Eastern Europeans near Central Asia. Typical "Caucasoid" features include tan-to-light brown skin, wavy-to-curly hair, big jutting noses, rounded eyes and the ability to grow thick beards.


Western Europeans are just barely "Caucasoid" (they are only in that group due to their relation to Eastern Europeans and South Russians), and were the last Caucasoid group on earth to form.

"Negroid" (the nuanced term is "Congoid") is also a large group that includes people who are not "Black" (like Afro-Asiatics "Hamites" and the North African Berbers and Ethiopoids). Same with "Mongoloid".
quote:
Originally posted by Black Viking:
quote:
Originally posted by SistahSouljah:
Hey...

I thought it was because God ran out of brown crayons. That's why we're colored and they're not right? Confused

Big Grin Just kidding...


No, really it's because God had us standing against a wall like we were about to be arrested, and then he spray-painted us. laugh


LOLZ! I thought it was because God left Black people in the oven for too long, He didn't leave White people in the oven long enough, and He left Brown people in just long enough and they turned out juuuuuuuuust right...... lol
On racial categories, one case-in-point on how broad "racial" categories are is Central Asians. Central Asians (peoples from Turkmenistan, Tajikistan, Kyrgyzstan, Uzbekistan, Afghanistan, Kahazakstan, Turkey, Iran, etc.)are Caucasoid, yet they don't resemble Western Europeans very much. Central Asians have rounded (actually, semi-Monogoloidic eyes), big noses, fullish lips, wavy and/or curly hair, and brown skin.


About 100,000 years ago, some Central Asians traveled eastward into Asia (which was in the middle of an Ice Age) and became East Asians. Some traveled northward and westard into Eastern Europea (which as also in an Ice Age) and became Eastern Europeans (the first "White" people). And Central Asians themselves traveled from Africa about 180,000 years ago and became Central Asians (that's why Central Asians share many features with Black people, the lips and hair texture).


Even though Central Asians are Caucasoid, they more closely identify themselves with West Asians (Pakistanis, Burmese), South Asians (Indians) and East Asians than Europeans. They consider themselves Caucasoid Asians.

Pu Ti Da Mo [the Bodhidharma] (more commonly just called "Da Mo" in China) was the man who brought Buddhism to China in the 6th century. Who was from Central Asia (possibly Tajikistan or Kahazakstan), and he looked VERY Asiatic (and had some "Black"-like features):









quote:
Originally posted by Empty Purnata:
quote:
Originally posted by Black Viking:
quote:
Originally posted by SistahSouljah:
Hey...

I thought it was because God ran out of brown crayons. That's why we're colored and they're not right? Confused

Big Grin Just kidding...


No, really it's because God had us standing against a wall like we were about to be arrested, and then he spray-painted us. laugh


LOLZ! I thought it was because God left Black people in the oven for too long, He didn't leave White people in the oven long enough, and He left Brown people in just long enough and they turned out juuuuuuuuust right...... lol


lol laugh
White people and dogs have no natural origins. They were created.

You can no more get a white person from two black people than you can get a dog from two wolves.

The official lie is that they are mutants by nature. I say they are mutants by design. Additionally, white people are unnatural - allow me to elucidate upon this:

The SUN is the single most important thing in the physical universe - it feeds all and makes everything possible.

This applies to ALL life, plants, animals, etc.

The sun attacks whites on sight. They have to create chemicals that let them be daywalkers or the sun will shorten their lives considerably.

That's because they were never supposed to be here in the first place - they were made and they are against nature and nature is against them.

Plants drink up the sun and convert it into nourishment. Black skin drinks up the sun, too. We convert it into vitamin D and it nourishes us.

The only major lifeform on earth that is harmed by the sun is the white man. It's not because I want it to be that way, it just IS.

Secondly, whites can't exist unless they have a bubble around them.

They wouldn't be on earth RIGHT NOW if they hadn't spent the last 50,000 years wiping out or enslaving all the other races that would've bred them out of existence.

So, they can't exist amongst other humans because the simple act of making love with other races kills them as a race.

Can a muthafucka be any MORE un-natural? You aren't free to make love and you can walk in the sunlight. Oh, and you're spreading your dysfunction and chaos further than and other group has even TRIED.

They create technologies and societies that don't work WITH nature - oh, hell no - everything they invent kills off entire species or pollutes areas for thousands of years, etc.

They curse the barefoot 'mud races' who co-exist with nature and are generally ecologists who take care of their land.

The white man is the only one who cannot live in the house God gave us and he is no ruining it and making it uninhabitable. Even dogs don't shit where they lie.

Only the white man.

Where did you come from?

There was alot going back then that was alot more advanced than we are now.

I think man, in general was also helped along. For us to leap this far away from other primates is unprecedented.

We were turned into and entirely alien creature, in regards to our ape relatives. No other creatures are so similar yet one having such a huge curve on the other.

It is not a natural thing. Religious people say we were created and I agree. We just don't agree on WHO did it...

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