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The Story of Disability Justice

A French physician identifies the genetic component of Down syndrome.

Date: 1959

The Story of Disability Justice
GEN
DCRJ
SRA

Dr. Jérôme Lejeune identifies Down syndrome as the result of a person having three copies of chromosome 21 (instead of two). The term "Trisomy 21" emerges to describe people who have previously been identified as "Mongoloid."