Slide showing hierarchical chart of 'Erythroblastosis Foetalis'. Slide shows hierarchical chart of 'Erythroblastosis Foetalis'. Title given above chart. Chart is in two parts - 'I' showing 'CDe/cde' represented by '1' and a white square on the chart, and 'cde/cde' represented by '2' and a white circle on the chart; 'II' showing '1 [white square] cde/cde'; '2 [white square] CDe/cde'; '3 [black square bisected diagonally with a line] CDe/cde'; '4 [white circle] cde/cde'. Title below chart reads 'Fig. 15. - Pedigree showing the mode of inheritance of the Rhesus antigents'. Late 19th to early 20th century