Genetics
According to recent genetic analysis, both mtDNA and Y chromosome polymorphisms showed a noticeable genetic affinity between the Norwegian population and other ethnic groups in Northern and Central Europe, particularly with the Germans. This is due to a history of at least a thousand years of large-scale migration both in and out of Norway.
The Norwegian population is typical of the Northern European population with Haplogroup I1 being most common. Norwegians also show the characteristic R1a genes of the paternal ancestorship at 17.9% to 30.8%. Such large frequencies of R1a have been found only in East Europe and India. R1b gene showing paternal descent is also widespread at 25.9%. to 30.8%
Read more about this topic: Norwegians