Genetic data show that 14 psychiatric diagnoses cluster into five families of shared risk, explaining why conditions like depression and anxiety often occur together.

Sometimes, a small error in the sequence of DNA can lead to a very serious disease. Scientists have identified many mutations that arise in a single gene to cause an ...

For decades, geneticists have known that most common illnesses are not caused by a single rogue gene but by intricate constellations of DNA variants acting together in specific cells. Now a new ...