Science Talk: Conversation Cards (Tabletalk Conversation Cards)

DNA is a molecule in almost every cell. It is a long, spiral structure, like two threads wound around each other and linked by chemical bridges. The sequence of these bridges is the genetic code, which determines what the cell does. Your DNA is unique, like your fingerprints. No other person or thing has the same as you. In what other ways can you be identified? Your voice, your walk, your mannerisms? Which of your personal traits do you prize most?