Y-DNA-HAPLOGROUP-I-L Archives

Archiver > Y-DNA-HAPLOGROUP-I > 2006-05 > 1147113948


From: "Aaron Hill" <>
Subject: Understanding Haplogroups...
Date: Mon, 8 May 2006 18:45:48 +0000


Understanding Haplogroups...

http://www.familytreedna.com/hap_explain.html

What is a haplogroup?

One way to think about haplogroups is as major branches on the family tree of Homo Sapiens. These haplogroup branches characterize the early migrations of population groups. As a result, haplogroups are usually associated with a geographic region. If haplogroups are the branches of the tree then the haplotypes represent the leaves of the tree. All of the haplotypes that belong to a particular haplogroup are leaves on the same branch. Both mtDNA and Y-DNA tests provide haplogroup information, but remember that the haplogroups nomenclature are different for each.

Y-DNA haplogroups

A Y-DNA haplogroup is defined as all of the male descendants of the single person who first showed a particular SNP mutation. A SNP mutation identifies a group who share a common ancestor far back in time, since SNPs rarely mutate. Each member of a particular haplogroup has the same SNP mutation.
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