UTG pot raise, what do we suspect?

[uberpron]

In theory, how often do we put an UTG pot-bet on AA-QQ? Question concerns specifically, calling with JJ-99 + FD type hands when the flop comes A/K/Q, J, x, x. Do we immediately suspect set-over-set? And, if so, is the best preflop line to fold to these large UTG, UTG+1 bets with JJ-99 type hands?

Thoughts appreciated.