Dermatitis, Diabetes, Dementia:
Dermatitis, Diabetes, Dementia:
A treasure trove for biomedical science, chromosome 20 contains nearly 60 million DNA "letters", and more than 720 genes - less than half of which have been fully characterized. An intriguing discovery is that the sequence also shows that two in five of us have an extra 'chunk' of DNA. This region appears to be an 'insertion' and contains at least one gene.