All three types of the minor scale have a half step between scale degree 2 and scale degree 3. The Dorian mode also has a half step between those two scale degrees.
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The type of scale that has half steps between those scale degrees is a harmonic minor scale.
The half-steps are between the 2nd and 3rd scale degrees, and between the 5th and 6th scale degrees. In the key of A minor, that's between B and C, and E and F.
The semitones (half steps) in a major scale are between the 3rd and 4th and the 7th and 8th notes.
3. There's one between scale degrees 2 and 3, one between 5 and 6, and one between the leading tone and tonic.
Using C harmonic minor as an example, the notes are C D Eb F G Ab B C. The half steps are between D and Eb, G and Ab, and B and C. Going by scale degrees, the half steps are between the 2nd and 3rd, the 5th and 6th, and the 7th and octave.