This is a good opportunity to track shifting gene frequencies
due to immigration and/or differential fertility. It would be a
good idea for countries to start spending some money on a
genetic census of their population. This would not need to
involve all the inhabitants, and could be carried out for the
fraction of cost that governments pay to collect all sorts of
other statistics. Such a census would provide an important
source of data to future scientists investigating the demography
of Europe during this transitional era. From the paper: Several
haplogroups had interesting frequency patterns, but also wide
confidence intervals, necessitating caution in the
interpretations. The mtDNA haplogroup with the strongest
geographical cline, U5b, is known to have high frequencies among
the northern Saami population, consistent with our results
(Tambets et al. 2004). The high frequency of the Y-chromosomal
R1b in the south, observed also by Karlsson et al. 2006; is
consistent with its abundance in Central Europe and