Possible. Random baldness does happen. But environmental based baldness is pretty rare and happens under extreme circumstances that tend to manifest in other ways than hair dropping out.
It can also be single X chromosonal on the grandparents/great grandparents from the mother's side. Your uncles on your mother's side were just fortunate enough to get the clean X. Your mother got both (or the "bald" X from the great grandparents), and you happened to pick up the "bald" X.
If your grandparents had a huge number of children that all have hair, that sorta complicates things (unless your great grandfather was bald). Genetics, it's fucking hilarious.
You do get one power from nuclear reactors: Greatly heightened cellular generation. Like Wolverine. 'cept it's fatal.
