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X-DNA Advanced Advanced topics about X-Chromosome matching and anthropologic blocks based on SNPs and/or STRs.

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Old 29th May 2017, 08:24 AM
birdie birdie is offline
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My father's mother?

Hello,

Something perplexing is showing in my autosomal results.

I am female and have a match with another female as a 2nd to 4th cousin. I am luckily able to verify, with our family trees, that our most recent common ancestor is indeed a 3rd great-grand-mother of mine. This would be my father's, father's, mother's, father's mother.

I also have an X-Match with this distant female cousin. 3 segments totaling about 15.77 cM, in case that's relevant. It's not much but it's more than my other X-Matches who aren't closer relatives.

The X chromosome my father passed to me strangely seems to come from his father's side of the family, which is Y side, not X.

Am I missing something? This shouldn't happen, correct? If my father's "mother" is not from that side of the family? I have not found any cousins from my father's "mother's" side of the family that match with me knowing, of course, there may not be enough information provided from my other matches. But I do not believe my father's "mother" is related to the side of the family I'm referring to in any way.

My father was color blind, I believe this is a disease of the X chromosome but not sure if that could be related.

Is my father's "mother" not his mother? Can't figure out If I am missing something.

Thanks for any help anyone can provide.
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Old 17th July 2017, 01:15 PM
keigh keigh is offline
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You got only part of your X chromosome DNA through your father, and he got his solely through his mother. A man doesn't inherit X chromosome DNA from his father. A woman inherits X chromosome from both her father and her mother. So your matches X material may come from the female side of your family.

I know in my own case, I have a number of people who share cousins with me from both sides of my tree. And it does get to be terribly difficult to weed through the generations trying to find which line of my father's side moved out of WV and into my mother's family's areas of TN, TX, MO and such.
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