"In 1968, the electromagnetic force and the weak interaction were unified, when they were shown to be two aspects of a single force, now termed the electro-weak force."<quoted text>
But because they are subject to the laws of physics, they are not.
This is one things we know about dark matter: it does not interact strongly with light, i.e. E&M. So the answer is no.
There is no reason particles *have* to interact strongly with E&M: if they are uncharged, for example. I'm not sure how to interpret the rest of your questions: the gravity of dark matter 'originates' in the same way as for ordinary matter: from the energy density (mass included in the energy here). The best bet as of right now is that dark matter is composed of particles that interact primarily through the weak force, not E&M or the strong force. If dark matter is composed of axions, though, there would be a weak interaction with E&M, which could even explain the 511MeV glow around out galaxy. At this point, we need more data.
Same process it appears. Not different and unique forces. They will find the same with the others once they clean their toy box out of particles, and all of their flavors. They have collected so many in their game they got confused about what they were doing.
Like a water stream, you can't see the basic energy flow when you are in it. But you can see ripples and whirlpools in it when it encounters obstructions. Just slowing down a section will do that. They make what is then called an object, or a particle.
Weren't particles "made" after the Big Bang? Wasn't there a shrinking? That was back and forth motion, was it not?