Does that explain it?
That pretty much explains things. My experience is in DNA has been in the genealogical area. Most of these articles are long on theory and short on detail. My family tree seems to go back to ancient Troy and I am trying to verify some of it through DNA.
The ancient Romans (i.e., Augustus) claimed their ancestors came from Troy, as extolled in Virgil's Aeneid, but to my knowledge, no physical evidence of that has ever been found.