David Brin wrote: > > Here's a thought: > Ghengiz Khan's genes appear in 8% of modern Chinese population - > AFAIK, the exact study is that Ghengiz's Y-chromossome was studied.
> that's an amazing new finding indicating how systematically and > effectively he used his harem. Probably more effectively than any > other ruler. > Or maybe his younger brother was busy raping women while he was conquering the world :-) > Here's what's interesting. So huge an experiment in "eugenics" that > HE must have been 75%+ reconstructed several times in the last 8 > centuries. If genes determined fate, he would have ridden again. > ??? How do you get this 75%+? How diverse are human genes? If we suppose that every pair has four possibilities [from a hypothetical genetic Adam and Eve], the chance of two humans being genetically equal in a population of 100 Giga people would be 75% of a millionth! [namely: (1/6)^22 * 100e6 ] But I guess there are more than four different possibilities for each gene, and it increases with time, because genes have the nice property of crossing over: switching part of one gene with the conjugate pair. Also, this computation does not account for the mithochondrial DNA, that may have some influence in the buildup of men. Alberto Monteiro _______________________________________________ http://www.mccmedia.com/mailman/listinfo/brin-l
