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.
