A Segment-ology TIDBIT
A Chromosome Map divides each chromosome into segments [or TGs] from specific ancestral lines. The data we get is fuzzy (see Fuzzy Segments), so the size and boundaries of these ancestral segments is a little fuzzy. But so what! For genealogy purposes these ancestral segments are large “targets”. Most shared segments with Matches easily hit these targets. The ancestral line “owns” their target segment. For genetic genealogy, that’s what matters – linking Matches and Common Ancestors with segments. It doesn’t make any difference if the shape or size of the target segment (TG) is a little blurry.
[22C] Segment-ology: Roughly Right is OK for Genealogy TIDBIT by Jim Bartlett 20170102