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).
Mike Singletary and the Bears' 46 defense overwhelmed opponents. The Bears had a very good offense in 1985, but it was Buddy Ryan's blitzing 46 defense that earned this team Page 2's honor of greatest NFL team of all-time.