Ionian Bass Scale (Major Mode)

G:---------------------------4-5-7---------------------------|
D:-------------------4-5-7-----------------------------------|
A:----------3-5-7--------------------------------------------|           
E:--3-5-7----------------------------------------------------| 
     GAB   CDE   F#GA   BCD

Dorian Bass Scale (Minor Mode)

G:----------------------------5-7-9--------------------------|
D:-------------------5-7-9-----------------------------------|
A:----------5-7-9--------------------------------------------|           
E:--5-7-8----------------------------------------------------| 
    ABC   DEF#  GAB  CDE