Osteogenesis Imperfecta COL1A1 Autosomal Dominant

A 5-year-old boy with recurrent fractures from minimal trauma, blue sclerae, and dentinogenesis imperfecta is evaluated. His father has similar features and sustained multiple childhood fractures. The paternal grandmother also has blue sclerae and bone fragility. The proband's older sister is affected, but the mother and her family are completely unaffected. The pedigree pattern shown in the diagram at **A** is most consistent with which inheritance pattern?