PCA (Principal Component Analysis) applied to
the genetic variances in the ocurrence of certain gens, reveals that they exist
4 main factors to explain genetical diversity in Europe:
1) Agriculturalist expansion (from Middle
East)
2) Uralic migration from the North
3) Indoeuropean migration from nothern Black
Sea
4) The Greek exansion.
The maps of frequencies of ocurrence can be seen
at:
David S.