according to the internet 1 in 733 babies has downs so about 8589 people in Tennessee have downs
people that have down syndrome have 47 chromosomes they get 23 from the mother and 23 from their father they are different from others because the have a extra chromosome that make them different...
Approx 1 in 800 or 0.12% or 340,000 people in USA Down syndrome occurs in 1 in 800 births. Hopefully that helps :D
Like one million and going up everyday