Concept 20 A half DNA ladder is a template for copying the whole.

Frank Stahl Matthew Meselson Arthur KornbergFrank Stahl is Emeritus Professor of Biology at the University of Oregon. He maintains a research interest in characterizing and comparing the genetic recombination systems of yeast and coliphage. Matt Meselson is a Professor in the Department of Molecular and Cellular Biology at Harvard University. His laboratory studies sexual reproduction and genetic recombination, and how and why they are maintained in evolution. Arthur Kornberg was Professor Emeritus in the Department of Biochemistry at Stanford University. Dr. Kornberg investigated DNA replication.

Matthew Meselson