Trisomy 21 is caused by a genetic modification. By adding to the 21st pair of chromosomes, the cellules end up with 47. It is that supernumerary chromosome that distinguishes Hanna, the character in Uma Menina Está Perdida no Seu Século à Procura do Pai, the book by Gonçalo M. Tavares that the actors from the Crinabel group brought to the stage. This chromosome disorder is give...