This is the sixth video in a series focusing on the biology and treatment of breast cancer.

Cancerous tumors grow when cell replication gets out of control. Fundamentally, this is a problem having to do with the cellular controls (and checkpoints) associated with the process of mitosis. Plainly put: cells replicate more often than than should.

For more information on the biology of breast cancer, visit www.evo-ed.org.

Support for this work was provided by the National Science Foundation's Division of Undergraduate Education program under Award No. DUE2020221