Forecasts of Genetic Fate Just Got a Lot More Accurate
Doctors already test for rare, deadly mutations in individual genes. Think of the BRCA breast cancer gene. Or the one-letter mutation that causes sickle-cell anemia.
But such one-to-one connections between a mutation and a diseaseââthe gene for Xââarenât seen in most common ailments. Instead, these have complex causes, which until recently have remained elusive.