The father of modern genetics, Dr. Jérôme Lejeune, discovered that an extra copy of chromosome 21 was responsible for the condition known as Down syndrome. Read More >
1590: Invention of the microscope Janssen (as Attributed to Galileo in 1609). Read More >
Jérôme Lejeune was born in 1926 in Montrouge, near Paris. He studied medicine and became a researcher at the National Center of Scientific Research (CNRS) in Paris in 1952. Dr.
Read More >Genetic intellectual disability can be caused by a number of factors.
Read More >In 1958, Professor Jérôme Lejeune, a doctor and researcher at the Necker Hospital in Paris, discovered an extra chromosome on the 21st pair and in so doing discovered the genetic cause of Down syndrome. Read More >
The Jerome Lejeune Foundation (France and the U.S.) was founded in 1996 to carry on the work of the legendary geneticist, Jerome Lejeune. Through its mission of research, care, and advocacy, the Jerome Lejeune Foundation serves those with Down syndrome and other genetic intellectual disabilities in a spirit of profound respect for their inherent human dignity, and that of all human persons.
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