SELF-WRITING CODE. “The genome has traditionally been treated as a Read-Only Memory (ROM) subject to change by copying errors and accidents. In this review, I propose that we need to change that perspective and understand the genome as an intricately formatted Read–Write (RW) data storage system constantly subject to cellular modifications and inscriptions.”
http://www.thethirdwayofevolution.com/people/view/james-a-shapiro