Science
How does DNA know which job to do in each cell? – Livescience.com
If each cell carries the same blueprint, what sets them apart?

A copy of your DNA is harbored in the nuclei of all 37.2 trillion of your cells. Theoretically, all of these cells have the same capabilities, because they carry the same blueprint. So how does your DNA
know when it’s in a blood cell versus an olfactory…
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