Earlier, cruder studies, done before direct genetic testing was feasible, suggested that African Americans were 25 or even 30 percent white. In 25 sites an 3,000 people in, he is coming up with 17-18 percent white ancestry among black Americans. Thats the equivalent of 106 out of 128 of your ancestry frojm 7 generations having been African and 22 European. The admixture rates vary by region, the highest white ancestry of blacks has happened in places like California, and Washington. They average a little over 25 percent white ancestry. Amongst the Gullah's South Carolina and Georgia, it is 3-4 percent white. In the rest of the rural south black Americans tend to not be as black as the Gullahs but blacker than the national average. In four Lowland farm counties in South Carolina it was said to be 12-13 percent. In places like Missippi it is said to be around the average, in New York it is said to be closer to 27 percent, while Philly is a little below the average. I know somebody probably has gotten to this article before me but I thought was interesting. I was worried about finding white ancestry in my paternal line, that is the one that goes from father to son, but it is very unlikely given these results. I've gone back just 5 generations on my paternal line and haven't found in white ancestry no where near it, thank God. There do exist some black males with European y-chromosomes but fewer than previously thought.