Spencer tracy had a son and i think he was deaf, is he still alive and what is he doing?

No, his son John Tracy died at age 82 in 2007. He was deaf, having suffered with Usher Syndrome, a genetic disorder that left him deaf and visually impaired. In 1942 his mother founded the John Tracy center which provided free care for children afflicted with hearing impairments. Despite John's handicap (and becoming blind later in life) he seems to have lived life to the fullest. He married, had a son and lived his dream of working in the cartooning department at Walt Disney studios.