A haplogroup is a major branch on either the maternal or paternal tree of humankind. Haplogroups are associated with early human migrations. Today these can be associated with a geographic region or regions. Note: Though [...]
A half-identical region (HIR) is when two people share a DNA segment that half matches. The half-identical region may be either identical by descent (IBD) or identical by state (IBS). Note: This is a colloquialism.