Joe is color blind. Both his mother and his father have normal vision, but his mother's father (Joe's maternal grandfather) is color blind. All Joe's other grandparents have normal color vision. Joe has three sisters-Patty, Betsy, and Lora-all with normal color vision. Joe's oldest sister, Patty, is married to a man with normal color vision; they have two children, a 9 -year-old color-blind boy and a 4-year-old girl with normal color vision. a. Using standard symbols and labels, draw a pedigree of Joe's family. b. What is the most likely mode of inher itance for color blindness in Joe's family