Was Jazz derived from Blues, or vice versa?

Yes and No. Jazz has a prominent part of blues. But it wasn't completely derived from blues. I would consider jazz like metal. Both of them weren't derived from a single genre. Both of these genres are pretty complex. Jazz is both a popular and art music at the same time. While blues is mostly popular music. read more

My understanding of it is that Jazz grew from Blues and other stuff rolled together. Military Marches, French Opera, Chamber music, Minstrel Pop, Dixieland all fused with the African influenced Gospel, work songs, and traditional blues singing. read more

Variations on the blues scale that include the natural third, fifth, or seventh can be used as well. Also, note that if the flatted fifth is omitted, the resultant scale is the minor pentatonic scale. The minor pentatonic scale can thus be used as a substitute for the blues scale, and vice versa. read more

The ii–V change is ubiquitous in jazz, and the blues progression is no exception. In this case, since you’re approaching a B b 7 chord, the Cm7–F7 leading up to that measure is called a ii–V of IV (Cm7 = ii and F7 = V of B b 7). A defining characteristic of the blues is the IV7 on the fifth bar (or first bar of the second phrase of the tune). read more