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In brief : From tiny beginnings

点击量:   时间:2017-07-08 04:02:12

A SINGLE early hominid population in Africa gave rise to modern humans, a study of human DNA suggests. A team led by Ulf Gyllensten of Uppsala University in Sweden examined the non-coding DNA surrounding a group of immune system genes that date back several million years, before humans separated from other apes. The genes themselves vary widely, suggesting they may have originated in large, widespread populations. But Gyllensten’s team found that the non-coding DNA is far more similar than was thought (Nature Genetics, vol 18, p 237). They conclude that the genes originated in around 10 000 individuals. This population was probably too small to be spread out across the world,