I have used the FF autosomal test from ftdna. My father had no father of record on his birth record in Germany in 1907, and his mother's brother had died at 14 before my father was born. I have had two sons. As far as I know (please correct me), my sons' auDNA tests would not carry any of my father's DNA. Is that correct?
The only personal remnant I have from my father is a hat that was not often worn (he was partly bald and used it for CA's "cold" weather). He died in 1984 and the hat has been in a footlocker in my AZ garage since then. If there had been any DNA on it (I have assumed not), the summer heat in the garage plus aging would I suspect have deteriorated it. But if it would still be useful, where would I take it for analysis?
Uh--just remembered: I have his tennis racket from the 1930s, kept inside my house.