Many chimpanzees have been used in medical lab experiments because the chimp's body is so similar in many ways to a human body. The adult height ranges from 50 to 66 inches,and the weight from 90 to 170 pounds. The males are closer to the top of that range while females are in the lower part. Chimps have dark brown or black hair over most of their body, but both males and females commonly get bald on top with age.