Down syndrome

First identified in the nineteenth century, Down syndrome is one of the most recognizable genetic disorders, marked by characteristic facial features and mild to moderate intellectual disability. Since scientists discovered in the 1950s that people with Down syndrome have an extra copy of chromosome 21, there has been much more research into the disorder, how to screen for it, and how to treat individuals who have it. This informative book covers all aspects of Down syndrome and includes accounts from people who have it.