Slide showing pedigree chart of Albinism. Slide showing black and white pedigree chart of Albinism. Title appears at top of image. Title below image reads: 'Fig. 6 - Pedigree of Albinism, an autosomal recessive'. Chart consists of symbols that are numbered with no corresponding explanation. The four family levels are labelled I - IV. Late 19th - early 20th century