Once a major chord has been established, a Minor chord is just one step away. Simply take any Major chord, and lower its third one half step.
Bb Maj to Bb Min |
A Maj to A Min |
Let us now add to our chart, to show both the Major and Minor chord constructs. Notice that, by simply changing one note, one can form a Minor chord from any Major chord, and vice versa. Also notice that the column representing the Major chord, the basis for all other chords, is shaded for easy identification. The Minor column is placed on the left side of the Major column, to illustrate the "falling" nature of the third of the chord.
Here is the same chart as it would appear using a C Chord.