10-24-2011, 03:14 AM
[quote name='dhu' date='20 October 2011 - 07:50 AM' timestamp='1319076769' post='113399']
G. Subramaniam,
The albino mutation is very recent while Europe has maintained a population for ~40K years (versus 85K in S Asia)
The question to ask is: Why did such a mutation not become established earlier if there were selective pressures.
Because, like the Eskimo-Inuits, the paleo-European diet was rich in Vitamin D acquired through fish fare, and therefore no pressure to select away darkened skin (darkened skin prevents endogenous Vitamin D formation in the skin via sunlight)
When the marine source of Vitamin D was lost because of Indic Neolithic (with no fish fare), the albino mutation became selective and became established (this mutation was most likely present in the originating populations in Kashmir/Punjab/Afghanistan)
Let us say the albino mutation is off-dated by 4 or 5 millenia in either direction.. It does not matter as long as it was not present since the outset of AMH presence in Europe, and a few ten millenia onwards..
The case of Inuits is the exception which proves the rule.
[/quote]
http://en.wikipedia.org/wiki/Human_skin_...7446367-22
The theory suggests that the reduction of game meat, fish, and some plants from the diet resulted in skin turning white many thousands of years after settlement in Europe and Asia.[44][45] This theory is supported by a study into the SLC24A5 gene which found that the allelle associated with light skin in Europe may have originated as recently as 6,000ââ¬â10,000 years ago[23] which is in line with the earliest evidence of farming.[46]
^ a b Gibbons, A. (2007). "AMERICAN ASSOCIATION OF PHYSICAL ANTHROPOLOGISTS MEETING: European Skin Turned Pale Only Recently, Gene Suggests". Science 316 (5823): 364a. doi:10.1126/science.316.5823.364a. PMID 17446367.
So they became white just by 4000 BC
Also the pre-R1B Europeans were fishermen and this enabled them to survive Europe without pale pigment.
Also, Otzi, the frozen iceman from north Italy who froze 5000 years ago, was DNA analysed to be of haplogroup G2.
whereas 75% of modern Italians are R1b
G. Subramaniam,
The albino mutation is very recent while Europe has maintained a population for ~40K years (versus 85K in S Asia)
The question to ask is: Why did such a mutation not become established earlier if there were selective pressures.
Because, like the Eskimo-Inuits, the paleo-European diet was rich in Vitamin D acquired through fish fare, and therefore no pressure to select away darkened skin (darkened skin prevents endogenous Vitamin D formation in the skin via sunlight)
When the marine source of Vitamin D was lost because of Indic Neolithic (with no fish fare), the albino mutation became selective and became established (this mutation was most likely present in the originating populations in Kashmir/Punjab/Afghanistan)
Let us say the albino mutation is off-dated by 4 or 5 millenia in either direction.. It does not matter as long as it was not present since the outset of AMH presence in Europe, and a few ten millenia onwards..
The case of Inuits is the exception which proves the rule.
[/quote]
http://en.wikipedia.org/wiki/Human_skin_...7446367-22
The theory suggests that the reduction of game meat, fish, and some plants from the diet resulted in skin turning white many thousands of years after settlement in Europe and Asia.[44][45] This theory is supported by a study into the SLC24A5 gene which found that the allelle associated with light skin in Europe may have originated as recently as 6,000ââ¬â10,000 years ago[23] which is in line with the earliest evidence of farming.[46]
^ a b Gibbons, A. (2007). "AMERICAN ASSOCIATION OF PHYSICAL ANTHROPOLOGISTS MEETING: European Skin Turned Pale Only Recently, Gene Suggests". Science 316 (5823): 364a. doi:10.1126/science.316.5823.364a. PMID 17446367.
So they became white just by 4000 BC
Also the pre-R1B Europeans were fishermen and this enabled them to survive Europe without pale pigment.
Also, Otzi, the frozen iceman from north Italy who froze 5000 years ago, was DNA analysed to be of haplogroup G2.
whereas 75% of modern Italians are R1b