Slide showing photograph of 'A gynandromorph of Drosophila melanogaster' (Fruit fly). Slide shows black and white photograph of 'A gynandromorph of Drosophila melanogaster' (Fruit fly). Title below image reads: 'Fig. 87 - A gynandromorph of Drosophila melanogaster that was female on the right side and male on the left. It was also yellow on the male side and grey on the normal side.' Late 19th century to early 20th