i got my DNA analysed a few years ago.
a couple months ago, i got rosemary’s DNA (my paternal great aunt) analysed. she has the same father as my great grandfather, but her mother is different than my great grandmother.
i figured that we would have some DNA in common, that we could both use to help determine who is part of our family.
apparently, we have ZERO DNA in common:
what the fuck?
ETA: it’s because the DNA analysis was done on our mitochondrial DNA, which, while easier to analyse, is passed through our mothers’ side. she had a different mother than my great grandmother, so there’s no overlap.