Haplogroup I1 (Y-DNA)

Haplogroup I1 (Y-DNA)

In human genetics, Haplogroup I-M253 is a Y chromosome haplogroup which occurs at greatest frequency in Fenno-Scandia. The mutations identified with Haplogroup I-M253 (Y-DNA) are M253, M307, P30, and P40. These are known as single nucleotide polymorphisms (SNPs). It is a subclade of Haplogroup I. Before a reclassification in 2008, the group was known as Haplogroup I1a. The group displays a very clear frequency gradient, with a peak of approximately 40 percent among the populations of western Finland and more than 50 percent in the province of Satakunta, and around 38 percent in Sweden as a whole, with a peak of 52 percent in Västra Götaland County in central Sweden.