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It is named after John Langdon Down, the British doctor who fully described the syndrome in 1866. Some aspects of the condition were described earlier by Jean-Ãtienne Dominique Esquirol in 1838 and Ãdouard SÃ©guin in 1844. In 1957, the genetic cause of Down syndrome, an extra copy of chromosome 21, was discovered.
For Watson, however, the sense of victory was short-lived. A freshman Republican from Ohio named John Boehner had proclaimed the Amendment the âclass projectâ of the 1990 freshmen. Watson still feels that Boehner hijacked his work.