My father died never knowing who his biological father was. His birth certificate has no father mentioned and whenever we speak to his mother who is still alive, she will not reveal any information.
He has a brother in another country who is considered a half-brother, but he may be his paternal brother however I was wondering....
If we were able to get both my DNA and my uncle's DNA sent together to a lab, would Y–STR male lineage DNA testing be able to test with high certainty whether my father and my uncle shared the same father?
Also would getting my uncle to send DNA samples half way across the world pose problems with shipping whilst maintaining viability of a reliable test?