Symbols used in pedigree charts
Note the method
of
identifying individuals in a pedigree: Roman numerals indicate
generations, numbers indicate the order of individuals in each
generation. The propositus
(or proband)
(II.2) is the
individual through whom the trait in question was first
is brought to the
attention of investigators. A consanguineous
('shared blood') marriage is one in which
the partners have at
least one ancestor in common.