Blues is known for bass, drums and heartfelt lyrics, all of which is found in Rock and Roll. Rock and Roll was just more upbeat and fast.
flapjacks
Wynonie Harris, Bo Diddley, Little Richard, Chuck Berry, Fats Domino, Robert Johnson...
In 1962 most of the first generation of Rock n Roll artistes were no longer performing for one reason or another. (Elvis had joined the army, the Everly Brothers were having artistic disagreements,...
If blues had never been developed there is a definant chance that Rock and Roll would never have been developed.