View Full Version : X-matching anomaly

05-13-2018, 07:07 PM
Maybe someone can explain this to me ...

I have three sisters -- Kim, Luci, and CJ. They, along with our brothers Bernie and Curt and myself, are full siblings.

These sisters match our father and each other on the X chromosome, just as expected.


Logically, both of Sarah's aunts should also match Sarah at the same location where they match our father and each other, but they don't.


The only thing I can think of to account for this is the chip version for Sarah. For everyone else but Kim, it's v2-v3, and for Kim it's v3 only. Sarah is, of course, on v5.