Practice question

Pedigree analysis traces transmission of monogenic traits through family generations using standardized symbols squares for males, circles for females, shading for affected status. By examining segregation patterns, generation skipping, sex bias, vertical versus horizontal transmission, mode of inheritance can be inferred logically without molecular data. It does not directly measure gene expression levels or protein interactions but reconstructs whether trait is dominant, recessive, X-linked, or mitochondrial. Pedigrees are indispensable for genetic counseling, recurrence risk calculation, and identification of carriers before targeted molecular diagnosis.