Small number of genes causing disorders

Geneticists from Trinity College Dublin have used evolution to work out why a small number of genes can contribute to autism spectrum disorders, schizophrenia, ADHD, intellectual disability, epilepsy and developmental delay.

They made this discovery by observing the genes over time and not as they are today.

There are more than 20,000 genes in the human genome that contain the all-important codes used to produce specific proteins in the body.