It’s the chord produced that’s minor. Just using those notes from that major scale and producing a chord starting on each note you produce these chord types:
C major7 - C, E, G, B
D minor 7 - D, F, A, C
E minor 7 - E, G, B, D
F major 7 - F, A, C, E
G dominant 7 - G, B, D, F
A minor 7 - A, C, E, G
B minor 7 b5 - B, D, F, A
Same chord types in any major scale. Just the roots would change.
Get a pen and paper and write out the notes from the C major scale, across two octaves. You take alternate notes, so 1 (root), 3 (third), 5 (fifth), 7 (seventh). Do that from each note and you’ll see what I’ve done.