03/21 is World Down Syndrome Day. The date symbolizes Down syndrome because there are three copies of the 21st chromosome.
Down syndrome was first described in 1866 by Dr. John Langdon Down, hence the name Down syndrome. But it was not until 1959 that the cause of Down syndrome was known. This year is the 50th anniversary of the Professor Jerome Lejeune's publication indicating that an extra copy of chromosome 21 is the cause of Down syndrome. Both Lejeune and Down contributed their own time and money to advocate on behalf of families and individuals with Down syndrome.
For more information about World Down Syndrome Day, please visit www.worlddownsyndromeday.org
Please remember that March 21st is World Down Syndrome Day and please tell someone about it! Thanks!
19 hours ago