I am confused. I thought that the standard model included 6 quarks and 6 antiquarks, 6 leptons and 6 antileptons and 5 bosons (W+,W-,Z,photon,gluon).
However in Griffith's "Introduction to Elementary Particles" (on page 48) he says that there are "12 leptons, 36 quarks, 12 mediators".
I am...