Standard Model:

12 particles
12 anti-particles

photon is origin.

Musical scale:

12 intervals up
12 intervals down

Tuning reference is “origin”.

Earth Year:

12 Full Moon phases
12 New Moon phases

SUN is “origin”.

Clock face:

12 ordinals AM
12 ordinals PM

Timing reference is “origin”.

Human Genome:

12 pairs of chromosomes - M
12 pairs of chromosomes - F

Mitochondrial DNA is “origin”.