It relates to the kind of biological mystery that people still chew on when they're trying to work out what we are and where we come from - cell differentiation being one of the major remaining mysteries of life. Also it's worth exploring is the question of what kind of template these electrical signals are unfolding from and explanations for that could range in scope from genetic to metaphysical.
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“Love takes off the masks that we fear we cannot live without and know we cannot live within. I use the word "love" here not merely in the personal sense but as a state of being, or a state of grace - not in the infantile American sense of being made happy but in the tough and universal sense of quest and daring and growth.” - James Baldwin