UTG is new player, playing 22/13 over 35 hands ($675 stack), Hero in the SB ($485 stack). Blinds $2/4

UTG raises to $12, Hero in the SB flats for $10 more with KQcc. 

Flop 6c5c2c (pot $27), Hero checks, UTG bets $24, Hero calls. 

Turn Jd (pot $76), Hero checks, UTG bets $68, Hero ???

My thoughts: His bet sizing was pretty large on the flop and again fairly large on this turn. I will be folding all of my 77-TT and probably continue to flat with 66,55, JJ, QQ and AcKx AxKc AcQx AcJx KcJx (if call that pre).  Not sure if I should have a c/r range here as I have noticed many players like to bet this turn thin and check back river (they aren't always polarized). The flush portion of my range I am unsure what to do with. Thoughts?