DNAprint Genomics (DNAG)

[dgplexus]

Frog, you seem to be misled. Getting a lot of samples from the currently existing populations is very easy, and populations can even be multiplied arbitrarily! The long lists of samples on that website *do not* correlate 1:1 with the reliable results; it's just not possible, even if people never migrated.

Correlating genetic material accurately to ancestral populations is quite different. Pinpointing the exact place a living person lives, or was born, is of course usually possible. But with population genetics, it's usually not possible. What is achievable is constrained by statistics and the nature of genetic inheritance, which include factors such as genetic drift, horizontal gene transfer (usually driven by selection of some kind, either of the genetic element in question or something linked to it,) loss of genes, etc. It's a messy statistical proposition, and DNAPrint is better at it than anyone else, in my opinion.