Confidence votes 251. A genetic code is the mapping of codons (three bases of DNA in an exon) to amino acids. There are 20 different amino acids and 64 possible codons. The universal genetic code is a particular mapping that is used by most organisms on earth.This points to a single origin of life.The universality of the genetic code means that all living organisms are descended from one original organism, which is at least useful information. From a religious point … of view, it could also be said that the creator god designed a successful genetic code and chose to use it universally.