The correct answer would be the following: In a pedigree, a vertical line and a bracket connect parents to their children. In biology, a pedigree is a diagram that shows the genealogy or lineage of an individual and all of his/hers direct ancestors. Pedigrees are used to show the inheritance of a specific individual. Genetics counselors use the pedigree to study and detect the nature of genes and alleles that are associated with specific human traits.