Which statement by the nurse indicates correct understanding of the purpose of a pedigree? A) "It is used for genetic counseling of the client by the geneticist." B) "It is used to show family history of a trait over at least three generations." C) "It is used to show a specific pattern of inheritance of a trait." D) "It is used to identify penetrance of a gene in a family."
B A pedigree is a graph of a family history for a specific trait or health problem over several generations.The other statements are inaccurate descriptions of the purpose of a pedigree.