A reader inquires about their girlfriend’s grandmother who has schizophrenia, but her girlfriend and her mother do not show symptoms, worrying whether the next generation will inherit the genetic trait for schizophrenia.

Relatives of patients with mental illness are at a higher risk, but inheritance is not absolute. There is no definitive answer to this question at present.

Pediatric cartilage dysplasia is a genetic disorder, usually caused by new gene mutations, and male patients have a 50% chance of passing it on to their offspring.