Explore the lytic and lysogenic viral replication cycles with the Amoeba Sisters! This video also discusses virus structures and why a host is critical for viral reproduction. Expand details for table of contents and further reading...

The 1943 Luria–Delbrück experiment, known as the "Fluctuation Test," demonstrated that mutations in bacteria occur randomly rather than as a directed response to environmental stress, such as viral infection. By showing wide variation in...