Britter & Irländare till 75% härstammade från Iberiskt stenåldersfolk

Ireland received the fewest of the subsequent invaders; their DNA makes up about 12 percent of the Irish gene pool, Dr. Oppenheimer estimates. DNA from invaders accounts for 20 percent of the gene pool in Wales, 30 percent in Scotland, and about a third in eastern and southern England. But no single group of invaders is responsible for more than 5 percent of the current gene pool, Dr. Oppenheimer says on the basis of genetic data. He cites figures from the archaeologist Heinrich Haerke that the Anglo-Saxon invasions that began in the fourth century A.D. added about 250,000 people to a British population of one to two million, an estimate that Dr. Oppenheimer notes is larger than his but considerably less than the substantial replacement of the English population assumed by others. The Norman invasion of 1066 brought not many more than 10,000 people, according to Dr. Haerke.