Figure 4 | Heredity

Figure 4

From: Intriguing evidence of translocations in Discus fish (Symphysodon, Cichlidae) and a report of the largest meiotic chromosomal chain observed in vertebrates

Figure 4

Testicular cells of Symphysodon aequifasciatus (a, d, g), S. haraldi (b, e, h) and S. discus (c, f, i) after C-banding (a–c) and silver nitrate staining (d–i). (a and b) Diplotene, showing heterochromatic blocks (arrowheads) in the chromosomal elements of the chain and in nearly all bivalents (arrows). (c) Diplotene with positive C-bands (arrows) in most of the bivalents. (d–f) Interphase nuclei, revealing five, six and four nucleoli (arrowheads), respectively. (g) Diakinesis with an NOR (arrow) on a large-sized bivalent. (h) Diakinesis, showing NORs (arrowhead) on an element of the chromosomal chain and on a medium-sized bivalent (arrow). (i) Diakinesis with an NOR (arrow) on a small-sized bivalent (scale bar: 10 μm).

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