Answer to Question #4325 in Molecular Biology for Brandon
How does a universal genetic code relate to the hypotheses about the orgin of life on Earth?
all organisms on Earth have one genetic code (except mitochondrias that probably changed it for some reasons).& In fact, universal genetic code is fundamental evidence that all organisms (viruses, bacterias, eucariotes) evolved from one common ancestor, because otherwise organisms should have different genetic codes. Furthermore, according to hypothesis of RNA world, all modern organisms came from one ancestor that was composed only from nucleic acids. This ancestor had RNA as a carrier of genetic information, and used same genetic code as now-living organisms.