Waralien,
Xenomorph,
15 years ago
In all the cases of radiation exposer, there always is some form of mutation. Third leg, arm, growth, etc....
But aliens are breeders, they can develop the most needed traits in their hive and use it to survive. I believe thats what the jockeys had in mind.
As for raditation, who knows? They can survive extreme heat and cold. Maybe they can survive raditation exposer, but in little doses. Large amounts would kill and corrupt them beyond all help