Might as well end a few race myths.

Might as well end a few race myths.

Ancient DNA reveals 'into Africa' migration - BBC News

"Every single population for which we have data in Africa has a sizeable component of Eurasian ancestry," said Dr Andrea Manica, from the University of Cambridge, who carried out the research.

http://www.bbc.com/news/science-environment-34479905

"Quite remarkably, we see in Ethiopia about 20% - so a fifth - of the genome of people living there right now is actually of Eurasian origin, it actually comes from these farmers," explained Dr Manica.
"But it goes further than that, because if you go to the corners of Africa, all the way to West Africa or South Africa, even populations that we really thought were purely African have 5-6% of their genome that dates back to these western Eurasian farmers."

Study Finds Africans More Genetically Diverse Than Other Populations

http://www.washingtonpost.com/…/…/04/30/AR2009043002485.html

Europeans Less Genetically Diverse Than Africans
Amitabh Avasthi
for National Geographic News
February 20, 2008

"European-American populations are less genetically diverse and have more potentially harmful genetic variations than African-American populations, according to an international team of researchers."

http://news.nationalgeographic.com/…/080220-dna-evolution.h…

"Modern humans and Neanderthals 'interbred in Europe'
http://www.bbc.com/news/science-environment-33226416'

Why do East Asians have 20% more Neanderthal DNA than Europeans?

http://www.geneticliteracyproject.org/…/why-do-asians-have…/

· Reply · 8 hrs

this is recent and they predict as many as 25% of African dna could be traced back to this particular Eurasion migration. However, this was not the first wave back to Africa. Africa was never closed off as is the common assumption.

http://journals.plos.org/plosgenetics/article...

This article demonstrates earlier back to Africa migration, pre-agricultural. "With these data, we demonstrate that most non-African ancestry in the HOA cannot be the result of admixture within the last few thousand years, and that the majority of admixture probably occurred prior to the advent of agriculture. These results contribute to a growing body of work showing that prehistoric hunter-gatherer populations were much more dynamic than usually assumed."

This is one reason why we say race is a cultural construct. If we study genetics, we see this. If we study history, we also see that Mediterranean immigrants to America were not initially considered 'white'. Irish immigrants initially experienced discrimination also and the effects of segration and exclusion have a legacy on crime in these populations that extends to today with the Irish and Italian mafias forming around ghettos, just as in black populations, who due to a darker appearance experience marked discrimination for a longer period of time. The exclusion and isolation of Appalachian whites also has a legacy on intelligence test scores, as they have lower scores, greater poverty, and greater impacts of drug use (most studies show whites use drugs more often than blacks, but blacks are checked and punished for sale and possession at far higher frequency, thus the greater impact is not due to greater frequency of usage). The causes are fairly practical, not genetic. 

The genetic diversity among people considered 'black' or 'African' in particular make the concept of race far more socially constructed than biological.