#1
I'm not sure but from what I've read on these forums, if i'm understanding them right, he may be wrong. He took musical theory in college so I do trust him but here's the question.

Basically he taught me all the modes, 3 notes per string form. Now he told me if i was playing in the key of G and i was to play the dorian mode I would play G dorian which would be the 2nd degree of the ionian so I would start on A. Is this correct? Or is he wrong?
#2
The Dorian scale just begins on the second degree of the scale, using the same notes. So you would be playing the A Dorian scale, which begins on A and continues through the notes of the G major scale.

G Major/Ionian (same notes, but not exactly the same concept):
G A B C D E F#

A Dorian:
A B C D E F# G

G Dorian would be based off the F major scale because it's the second degree of F. So G Dorian would be this:
G A Bb C D E F

Therefore, you want A Dorian and not G Dorian.
#3
Quote by :-D
The Dorian scale just begins on the second degree of the scale, using the same notes. So you would be playing the A Dorian scale, which begins on A and continues through the notes of the G major scale.

G Major/Ionian (same notes, but not exactly the same concept):
G A B C D E F#

A Dorian:
A B C D E F# G

G Dorian would be based off the F major scale because it's the second degree of F. So G Dorian would be this:
G A Bb C D E F

Therefore, you want A Dorian and not G Dorian.

I mean to say A dorian. So therefore he would be correct right?
#5
Yes, A dorian would be correct. This confused the hell out of me at first too.
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