Slide showing two tables, 'Table II: Male Heterogametic and female homogametic, female heterogametic and male homogametic' and 'Table III: Organisms with sex-determination by male haploidy.' Slide shows two tables, 'Table II: Male Heterogametic and female homogametic, female heterogametic and male homogametic' and 'Table III: Organisms with sex-determination by male haploidy.' Table II shows animals and plants with the characteristics above. Table III shows Insects, Arachnida and Rotifera displaying the above-named characteristics. No further information available. Late 19th to early 20th century