Dominant Seventh Chord in Major and Minor
Which statement best compares the quality of the diatonic seventh chord built on the dominant in a major key versus a minor key and explains the resulting effect on harmonic function?
The quality is the same in both major and minor keys, but the seventh is raised in minor keys to create a leading tone.
In major keys, it’s a half-diminished seventh chord; in minor keys, it’s a fully diminished seventh chord. This impacts its resolution tendencies.
In major keys, it’s a minor seventh chord; in minor keys, it’s a dominant seventh chord. This alters its role in cadential progressions.
In major keys, it’s a dominant seventh chord; in minor keys, it’s a minor seventh chord. This affects its strength as a dominant function chord.
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