Crissey Elementary

March 21 is known as World Down Syndrome Day. It is a global awareness day which has been officially observed by the United Nations since 2012. The date, being the 21st day of the third month, was selected to signify the uniqueness of the triplication (trisomy) of the 21st chromosome which causes Down syndrome.Down syndrome (or Trisomy 21) is a condition in which a person has an extra chromosome…