What does Haplogroup R1a1 do?

Question

It is a mutation in the y-chromosome. It comes from Viking descent. What is it exactly?

Answer 1

Haplogroups or haplotypes are collections of genetic constitutions. They might or might not associate with phenotypes or diseases. R1a and its sister haplogroup R1b, are both groups of genetic markers on human chromosome Y. They are used to analyze genetic heritage of human.

Answer 2

Haplogroup R, for instance, is identified by a y chromosome mutation known as M173. Roughly 70 percent of English men have this lineage, 95 percent of Spanish men, and 95 percent of Irish men.