FISH with the 18S rDNA (green signals) and H3 histone (red signals) probes on mitotic chromosomes of Hydra magnipapillata (A), and with the 18S rDNA probe only on mitotic chromosomes of Hydra oxycnida (B) and Pelmatohydra oligactis (C). In H. magnipapillata, the FISH signals derived from the 18S and H3 probes are visible on the largest pair of chromosomes, on their long arms and in the centromeric areas respectively. Chromosomes are counterstained with DAPI.

 
 
  Part of: Anokhin BA, Kuznetsova VG (2018) FISH-based karyotyping of Pelmatohydra oligactis (Pallas, 1766), Hydra oxycnida Schulze, 1914, and H. magnipapillata Itô, 1947 (Cnidaria, Hydrozoa). Comparative Cytogenetics 12(4): 538-548. https://doi.org/10.3897/CompCytogen.v12i4.32120