Slide showing ten diagrams illustrating various arrangements of chromosomes of unknown organism. Slide shows ten diagrams illustrating various arrangements of chromosomes of unknown organism. The diagrams are labelled 'a' to 'j'. Title below image reads: 'Fig 5 - Translocation between two (b-e) and between three (g - j) chromosomes. (a) and (f) normal chromosomes; (b) and (g) translocation homozygotes; (c) and (h) translocation heterozygotes; (d) and (i) chromosome arrangement at pairing stages; (e) and (j) arrangement of chromosomes at the metaphase of the meiotic division'. Late 19th to early 20th century