The single-gene mutations directly responsible for early-onset Alzheimer's disease do not seem to be involved in late-onset Alzheimer's, and researchers have not found a specific gene that causes the late-onset form of the disease.
The NFLâs worst defense in 2015 are expected to be the Atlanta Falcons, Jacksonville Jaguars, Tennessee Titans, Chicago Bears and Tampa Bay Buccaneers (not necessarily in that order).
Worst safety group: Dallas Cowboys. The Dallas Cowboys entered the draft with the shakiest-looking safety group in the league. They left with an additional third-round pick, safety JJ Wilcox, out of Georgia Southern who is light years away from contributing.