This has been reported before in other studies. Studies of different racial & ethnic genomes revealed minimal differences. Washington Post article here
"Scientists have long known that regardless of ancestral home or ethnic group, everyone's genes are pretty much alike. We're all Homo sapiens. Everything else is pretty much details..
Genetic geography here
. The greatest genetic diversity occured in mankind's orginal homeland, Africa. The populations that migrated the greatest distance from Africa, had the less genetic diversity