Selfish gene solves DNA replication puzzle

By Michelle Hawkins
You were formed from a single cell. To build you, and then keep you alive, the DNA in your cells needs to undergo replication every day to duplicate your chromosomes before cell division. Decades of research have determined that DNA replication begins at specific locations on the chromosome. These sites are called replication origins. Bacteria have a single replication origin but more complex organisms, such as humans, need thousands of these start sites. [Read more] ...