title: Origin of genetic instructions is presently unknown and unclear and requires scientific experimentation that is not readily possible.
authors.forename: Jack T
authors.initials: JT
authors.lastname: Trevors
mesh_terms: D000818:Animals; D004247:DNA / Q000235:genetics / Q000528:radiation effects; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D005815:Genetic Code; D006801:Humans; D012313:RNA / Q000235:genetics / Q000528:radiation effects; D014466:Ultraviolet Rays
chemical_list: D012313:RNA; D004247:DNA