The Blue part markers are a simpler pattern - Green are busier. The Vary Style setting John mentioned is very helpful if you want all of the choruses to be the 'same' as the first. If your song is AABA (Blue, Blue, Green, Blue markers), all of the choruses will use this marker pattern. If the Vary Style is checked, all of the middle choruses will be Green and the first/last will be as above.

You did not say if you were using Midi or RTs for Bass. There are plenty of Midi styles that should do what you want. If using RTs, there are Variations of Bass RTs - A: Simple, B: Walking. Check the Show RealTrack variations in the RT picker.

If you are using BIAB for practice as you say, go with a Midi style. You have much more control and many more styles to choose from. I suggest the earlier styles such as JAZSIMP.

R