opp is 15/8 agg 1.5 3bet 1.5 343 hands but this is not usual 3bet imo becouse of UTG fishyness. But anyway question 1 is pf call acceptable here? 4bet here is out of question i think.
question 2: he checks A high board so in my eyes there are possibility that he busted with TT/QQ/KK hands and giving up on A high board. My calling preflop strongly represents AK/AQ so i can bet and see how it goes? Can I? 
Waiting for response 
Hand converted with online PokerStrategy.com hand converter:
$0.1/$0.25 No-Limit Hold'em (9 handed)
Known players:
[tg]MP2$102.97:///////;MP3$55.44:///////;CO$48.95:///////;BU (Hero)$38.58:///////;SB$62.90:///////;BB$25.00:///////;UTG1$32.32:///////;UTG2$68.84:///////;MP1$48.30:///////;[/tg]
Preflop: Hero is BU with J:h, J:s.
UTG1 raises to $0.50, 2 folds, MP2 raises to $2.25, 2 folds, Hero calls $2.25, 3 folds, 2 folds, UTG1 folds.
Flop: ($5.45) 6:d, A:h, 4:s (2 players)
MP2 checks, Hero ?,
BTW: he check/raised me so I folded. 