>>14922086>>14922091>Recent studies have shown that Italy has played an important role in the recovery of 'Western Europe" at the end of the Last glacial period. The study focused mitochondrial U5b3 haplogroup discovered that this female lineage had in fact originated in Italy and that then expanded from the Peninsula around 10,000 years ago towards Provence and the Balkans. In Provence, probably between 9000 and 7000 years, it gave rise to the haplogroup subclade U5b3a1. This subclade U5b3a1 later came from Provence to Sardinia by obsidian merchants, as it is estimated that 80% of obsidian found in France comes from Monte Arci in Sardinia reflecting the close relations that were at the time of these two regions. Still about 4% of the female population in Sardinia belongs to this haplotype.[19]>The emergence of population genetics further undermined the categorisation of Europeans into clearly defined racial groups. A 2007 study on the genetic history of Europe found that the most important genetic differentiation in Europe occurs on a line from the north to the south-east (northern Europe to the Balkans), with another east-west axis of differentiation across Europe, separating the "indigenous" Basques and Sami from other European populations. Despite these stratifications it noted the unusually high degree of European homogeneity: "there is low apparent diversity in Europe with the entire continent-wide samples only marginally more dispersed than single population samples elsewhere in the world."[101][102][103][104]Europe is diverse but its culture, language, religion and dialect that make up differences more than DNA. The genes for ageing are not going to be that different between citizenships
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