I would like to arrange a DNA test to establish my paternal parentage. Of the 2 contenders, one is very elderly (late 80's) so I feel I can't ask him (& he'd refuse anyway I expect). The other 'contender' is deceased. Would the deceased's sister (who is willing) be adequate to establish this please?
I have very few resources so would an Ancestry / 23 & me type test be okay?