Ouroboros
Coincidentia oppositorum
Which is what I was referring to in my last sentence.Well, in genetics, the mutations don't exist in a vacuum like coin flips do. A coin flip is just there, it doesn't actually affect anything else. A mutation actually has survival benefits or detriments. A creature has to survive and a mutation either makes that easier, harder or has no effect. If it makes survival easier, that mutation gets passed on to the next generation more often, if not, it doesn't. The evolutionary pressures can operate on that mutation again in the next generation.
Mutations are random, but selection is external pressure based on many factors, mostly environmental.