Say you are working out a bassline in the key of C. The guitarist plays a Dm chord. To harmonise with this you can play any notes from the Dm chord. But do you also have the choice to play any notes from the mode based upon the second note of the C scale, i.e. Dorian with the tonic of D? Or playing over an F chord, the Lydian mode with the tonic F? Bit confused about this.