Category Archives: siblings

Chromosome Mapping with siblings – part 1

This month – another post on testing siblings and on using GEDmatch.

Sometimes, having siblings’ DNA tested is a real treat—such as when one of them connects to a distant cousin still residing in Ireland, just a few kilometers from where my ancestors came from. But sometimes—playing with sibling DNA can be a real challenge! Case in point: Chromosome mapping with three siblings. This is advanced stuff, yo.

Continue reading

How Irish are we?

Rumor has it that AncestryDNA and FamilyTreeDNA are working on updates to their “ethnicity” reporting. Since this is the month many of us celebrate being Irish (AncestryDNA is even offering a $10 discount on DNA kits in honor of St. Patrick’s Day), I thought I’d take a minute or two to muse over this question:

How can two full siblings (as seen in the pie charts above) have such different ethnicity reports?

Continue reading