Iowa outrebounded the gophers by 7 for the first half. As far as turnovers goes that could be as much a reflection of Minny taking better care of the ball as anything else.
Defensive rebound is the issue which is 2nd shots and even poor shooting teams can score at high rate.. Iowa is a a top 20 offensive rebounding team. It was close to 300 ranking in defensive rebounding last time I checked.