Here is Roberta Estes' "X Marks the Spot" article (with pictures) from her "DNA Explained" blog: https://dna-explained.com/2012/09/27/x-marks-the-spot/ Cheri Mello Listowner, Azores-Gen Researching: São Miguel island: Vila Franca, Ponta Garca, Ribeira Quente, Ribeira das Tainhas, Achada
On Tue, Jul 2, 2019 at 5:30 AM MaryAnn Santos <[email protected]> wrote: > Thank you for this explanation. It is very helpful. > > Best, > MaryAnn > > On Tue, Jul 2, 2019 at 5:35 AM Tomas Leal <[email protected]> wrote: > >> The XX configuration is tricky, which many either forget or do not >> realize. The Y-gene is so easy to follow because it always comes directly >> from father to son, father to son, at so on. My Y-gene is the exact same >> one my several times great-grandfather had (unless some genetic mutation >> occurred in between). >> >> With a female child, each parent contributes an X gene. Which grandmother >> that particular X gene came from is another matter. >> >> The X gene passed father to daughter had to come from the father's >> mother; however, she had an X gene from each parent, so the X gene the >> father passed on could have come either from his mother's mother or his >> mother's father. In turn, that X gene could have come from different >> grandmothers. >> >> What this means is full sisters can have different X genes via their >> mother, as the one from their mother passed could have come from any one of >> three grandmothers (either of two passed from the mother's parents or one >> passed by the father)! Add in great-grandmothers and it's even more >> complicated. >> >> In the case presented here, the fathers were different so the X gene each >> one passed could be from a different grandmother as well. Thus, we can see >> the importance of "triangulation" of getting DNA samples from first cousins >> for comparisons, in addition to that from siblings. >> >> Tomás Leal >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Azores Genealogy" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> Visit this group at https://groups.google.com/group/azores >> <https://urldefense.proofpoint.com/v2/url?u=https-3A__groups.google.com_group_azores&d=DwMFaQ&c=slrrB7dE8n7gBJbeO0g-IQ&r=O6OfeAffY1zaOvuoZCgyNQ&m=zQhB7rTg1jwz2iEfCtc1hdvOa3kBASwMi3FRTqEtNoc&s=46Rfv0TDypK7PH0wnMJ2zOdwvC3z1kheyPjqmAL4c3A&e=> >> . >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/azores/b90e1385-18d7-41b1-9ebb-799e6e5311fa%40googlegroups.com >> <https://urldefense.proofpoint.com/v2/url?u=https-3A__groups.google.com_d_msgid_azores_b90e1385-2D18d7-2D41b1-2D9ebb-2D799e6e5311fa-2540googlegroups.com-3Futm-5Fmedium-3Demail-26utm-5Fsource-3Dfooter&d=DwMFaQ&c=slrrB7dE8n7gBJbeO0g-IQ&r=O6OfeAffY1zaOvuoZCgyNQ&m=zQhB7rTg1jwz2iEfCtc1hdvOa3kBASwMi3FRTqEtNoc&s=JloWPPZFXFL37Xk5TEanRvUi5MBxPyrBBpdSFqC5MHg&e=> >> . >> > > > -- > *MaryAnn Santos* > Senior Advisement and Student Affairs Administrator > Department of Art and Art Professions > NYU/Steinhardt > 212.998.5702 > [email protected] > > Follow us at > > *Twitter / @NYUart <https://twitter.com/NYUart>Instagram / @nyuart > <http://instagram.com/nyuart>* > *Facebook / NYU Art Department > <https://www.facebook.com/pages/NYU-Art-Department/53833145389>* > > -- > You received this message because you are subscribed to the Google Groups > "Azores Genealogy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > Visit this group at https://groups.google.com/group/azores. > To view this discussion on the web visit > https://groups.google.com/d/msgid/azores/CAGLQU9Yw55%3Dxi50%2Bq7iqB_TTGp5M2LUgcZg%2BSP6d4AAjuN%2BoXA%40mail.gmail.com > <https://groups.google.com/d/msgid/azores/CAGLQU9Yw55%3Dxi50%2Bq7iqB_TTGp5M2LUgcZg%2BSP6d4AAjuN%2BoXA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Azores Genealogy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/azores. To view this discussion on the web visit https://groups.google.com/d/msgid/azores/CAKUUw_FPCYNGFiHKZ5Zv7hyak8EKuKnM0XrPzq73u3wKCoAbiQ%40mail.gmail.com.
