Why current admixture maps can be very deceiving

mihaitzateo

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Romanian
Y-DNA haplogroup
proly R1B
Hello

I was thinking, that current maps, of admixture, can be very deceiving.
Why?
For the simple reason that you can not know be sure who brought some admixture in some country.
Different populations moved a lot in Europe.
Take for example the Eastern Germanic tribes movements.
Or take the moves of other people, for example Slavic speakers.
What united those people was a common language and common customs.
So, take the scenario :
East Germanics are coming from current day land of Germany.How they got there, not matters.
There they assimilate a Celtic speakers family, which joins them.
However, that Celtic speakers family is carrying I1 ,being older Europeans.
They move this family towards Slavic lands.
The descendants of this family are settling in Slavic lands.
They do not migrate further with Eastern Germanics.
Than ,after some hundreds of years their descendants are moving towards Balkans.
Males bring there I1.
Which later is taken as a sign of Scandinavian ancestry.
As admixture:
These Celtic people are mixing with Germanic speakers and when settling to Slavic lands, are settling in a small community but which is gaining very fast resources.
They mix with Slavs there,let us say, 10 celto-germans come and settle in a community of 20 people.
After 300 years, they are 200 and they move to Balkans.
So, Maciamo, do you realize that your admixture maps are just gross estimations ?
And that paternal lines are even more gross estimations ?
No one can say with at least 75% precision, that I1 from England is for sure brought by Vikings that raided and settled there around the year 1000.
 

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