Kay-- Unless you doubt that your mother was also your brother's mother, I do not see a point in retesting your mtDNA or that of your son. Nor do I see a point in testing the mtDNA of your mother's sisters, unless, again you doubt who the mother was for both siblings. Male parentage does not have the same close proof that female parentage does. We know for certain who the mother of a child is -- when present for the birth. When I had my mtDNA tested, I sent the results to all my living female relatives and males within the proper generations and female descent in order they would know their mtDNA. I would spend the funds earmarked for repeat of your mtDNA tests on further Y-DNA testing. But then that could be the thrifty Scot in me speaking. Hard pressed to get us to spend, but when we do, we do it wisely. :) Yours Aye, Lauren H CRS 315.1c -----Original Message----- >From: N & K Chestnut <nkopportunity@gorge.net> >Sent: Oct 11, 2006 9:20 PM >To: scot-dna@rootsweb.com >Subject: Re: [SCOT-DNA] To Wanda > ><snip> In a few more years, I may decide to "double-check" our "mtDNA" [female line]. At this time there are several others for whom I could order another DNA kit, acquire a new DNA sample and have the new sample "mtDNA" tested: 1) mine, 2) my son, and 3) one of my mother's living sisters, or even 4) one of the daughters of my mother's sisters. Males have their mother's "mtDNA"; but they can NOT pass it on to any of their children. Males have their father's "yDNA"; but they CAN pass it on ONLY to their SONS, never to their daughters. > I do hope that my "wordiness" has made this clear, NOT more confusing. > >Kay Chestnut