You have seen a 14 year old boy on the ward who has an unusual set of musculoskeletal symptoms, and your consultant suggest it may be appropriate to refer him for genetic testing. You’re asked to draw a pedigree to send with the referral, based on the family history in the notes:
"…This young boy has one affected brother (8) and an unaffected brother and sister (10 and 2 respectively). Neither of his parents appear to be affected, nor his paternal grandparents or fathers brother. His mother has 2 unaffected brothers and one unaffected sister. The maternal grandfather was affected before his death, but his wife (also deceased) was not…"
