This week I had a terrific email conversation with Jasia from The Creative Gene about genetic genealogy.She left a comment on a recent post, Discovering My Maternal Roots, which asked:
“I’m a complete neophyte about DNA for genealogy. I’m wondering if there is any reason to test myself, and my mother. Since the mtDNA seems to trace the maternal line… is it enough to test just one of us or is there something to be learned by testing both of us?â€
This is a great question, one that many people who are new to genetic genealogy ask.Understanding how mtDNA and Y-DNA are inherited is one of the most challenging aspects of genetic genealogy.I always think of them as mirror images; if you chart your family tree, the Y-DNA travels down the far left line (from your father’s father’s fathers’ father…) while the mtDNA follows the far right line (from your mother’s mother’s mother’s mother…).Here is my response to her comment: