Henry is a carrier of Huntington's Disease. His partner Sophie has a sister with Huntington's Disease, which means the probability Sophie is a carrier is 2/3. If Sophie is a carrier, each child she has with Henry has a probability of 1/4 of having Huntington's Disease. She will not have the disease unless she is a carrier. 1. Draw a tree diagram. 2. Henry and Sophie have one child who does not have Huntington's Disease. What is the probability that Sophie is a carrier given the child does not have the condition?