Nearly all our cells have an identical copy of our genome, but they can look and behave very differently. This is because of how the genome is regulated in these cells.
Epigenetics controls how the genome is regulated without changing the DNA code. It can turn specific genes on or off, and even control the structure of the genome.
There are many types of epigenetic modification and most of them are transient and reversible, allowing us to adapt to our environment.
The epigenome can also have a considerable impact on health, and is linked to diseases such as cancer, and rare conditions such as Prader-Willi syndrome.
Modern drugs can target specific epigenetic modifications to manage and treat some disease more effectively.