Use the pedigree on the right to determine the genotype of Ryan. XRXR XRY XRXr XrY A pedigree for Ben and Lisa is shown. Ben is an empty square with an X Upper R Y genotype. Lisa is a half-filled circle with a X Upper R Upper X r genotype. Ben and Lisa have 2 children: Mike and Time. Mike has an empty square with a X Upper R Y genotype, and Tim has a filled square with Upper X r Upper Y genotype. Tim and Carol, who has a half-filled circle, have one child Ryan. Ryan has an empty square.