Which scale starts on the note "do"?

The Ionian Scale is recognized as the major scale in music theory and is defined by its specific pattern of whole and half steps. It starts on the note "do," which corresponds to the first degree of the scale. In the context of the solfège system, "do" serves as the tonic, establishing the key center for the scale.

The Ionian scale's structure consists of a specific sequence: whole, whole, half, whole, whole, whole, half. This sequence results in the familiar sound of the major scale, making it foundational in Western music. Other scales, such as Dorian, Phrygian, and Aeolian, have different tonal centers and note arrangements, starting on different degrees of the major scale and creating unique sound characteristics. For instance, the Dorian scale starts on the second degree, the Phrygian on the third, and the Aeolian on the sixth, each contributing to their distinct musical flavors.