Two relatives of mine (they're my 2C1R) - lets call them R (male) and M (female) are doubly related to each other. They're first and second cousins to each other.
R's paternal grandfather Alfred was my mother's paternal grandfather's brother.
M's paternal grandmother Kate was my mother's paternal grandfather's sister.
In addition R and M's mothers are sisters. Over at Gedmatch we can see that R and M match along the entire X-chromosome. They both inherited exactly the same X chromosome from a maternal grandparent.
We know therefore that the other X-chromosome that M inherited (which doesn't match R) has come from her grandmother Kate.
I'm trying to work out how to use this information. I have gone through their lists of X-matches on Gedmatch and excluded those who match R from M's list, but I don't think it's as simple as this.
R's paternal grandfather Alfred was my mother's paternal grandfather's brother.
M's paternal grandmother Kate was my mother's paternal grandfather's sister.
In addition R and M's mothers are sisters. Over at Gedmatch we can see that R and M match along the entire X-chromosome. They both inherited exactly the same X chromosome from a maternal grandparent.
We know therefore that the other X-chromosome that M inherited (which doesn't match R) has come from her grandmother Kate.
I'm trying to work out how to use this information. I have gone through their lists of X-matches on Gedmatch and excluded those who match R from M's list, but I don't think it's as simple as this.
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