Bob Grant | Jun 1, 2008 | 2 min read
In order to linkurl:evolve;http://www.the-scientist.com/news/display/23321/ novel traits, organisms may depend upon smaller, less dramatic mutations that they amass through their evolutionary history rather than suddenly acquiring a single mutation that gives them drastically different phenotypes, according to a study published online today (Jun 2) in __PNAS__. Whether an organism arrives at major evolutionary innovations through a single key mutation or a history of many accumulated mutations