Imagine this scenario: two people have the exact same error (or mutation) in the exact same gene. However, one person shows devastating symptoms of a genetic disease while the other has mild or no symptoms at all. This situation is the reality for many genetic diseases1. The reason for this shocking difference can be due to something known as a suppressor. A suppressor is a gene somewhere else in your genome (the instructions in your cells) that offsets the effect of the original mutation. Figuring out how suppressors work can teach us about how genetic diseases occur. They could also lead to something even greater: a cure.