With regards to major migrations to northern europe:
- 1. the time right after the Last Glacial Maximum (Holocene). My assumption is the existence of a separate north-eastern refuge area in addition to the southern.
- 2. the Bronze-age.
I'm afraid I don't know enough about this analysis in order to judge.
But the autosomal distribution of today could provide insight about the past.[/QUOTE]
I have advice from some managers on this topic and they stated:
your T haplogroup Y chromosome has been inherited virtually intact for generations. That's why the Y chromosome is so useful for genealogy.
However, the rest of our chromosomes are subject to recombination every generation. After 5 generations or so, we don't inherit any detectable DNA from some of our ancestors. Wherever your T ancestors came from, it's likely so far back your Y chromosome is probably the only genetic inheritance you got from them.
Genetic analyses like "farmer vs. hunter gatherer," comparing to neanderthal, etc. are for novelty purposes only.
Since T is only 6000 years old your marker was K and F before T, so farmer and hunter gatherers are useless.
Autosomal DNA tests have nothing to do with haplogroups. The tests from 23andMe, FTDNA, and Ancestry all use essentially the same chip, with a few differences between their product offerings: 23andMe added several thousand custom SNPs, which actually do test a few Y-DNA and mtDNA SNPs, plus they specifically display medically relevant SNPs. On the other hand, FTDNA actually strips the data of some medically relevant SNPs in an effort to preemptively avoid FDA scrutiny.
Both companies give you data about segments shared with matches, and allow you to download your raw data. That's what you can use for the 3rd party bio-geographical ancestry (BGA) analyses. FTDNA also allows importing the data from others into their database (only from 23andMe presently).
So far, Ancestry neither gives any information on shared segments, nor how much DNA you share with matches; they won't even let you download your own raw data.
Then more information , with a note to check the Heruli people who settled in Concordia Friuli in around 460CE, they have the T markers, but more R1a1 markers
so, there it is , doing any admixture tests others than a european one ( if your european ) is useless