As with arthrogryposis there is earnest debate about how many patients are afflicted due to ‘mechanical’ problems such as difficulties during birth and how many are afflicted due to genetics. Then there’s the question of whether other challenges such as lactose intolerance or tachycardia can be predicted from a given genetic configuration.
After a lot of dreary reading – we humans really are frail creatures when it comes to the consequences of getting an amino acid wrong – it appears that there are currently 15 genes that are associated with cerebral palsy. Offhand, while the human damage done is more than enough, that feels like too few. We are looking for a geneticist or two specializing in the area