Tetraploid origin of the karyotype of catostomid fishes.
Catostomid fishes appear to have 2n(-->4n?) approximately 100 chromosomes. The Cyprinidae, from which catostomids probably diverged before the Eocene, usually have 2n = 48 or 50 chromosomes. Preliminary cytophotometric measurements indicate an approximate doubling of DNA content of cells among catostomids.
D000818:Animals; D005075:Biological Evolution; D003530:Cyprinidae; D003582:Cytogenetics; D004247:DNA / Q000032:analysis; D004847:Epithelial Cells; D005399:Fishes; D005880:Gills / Q000166:cytology; D007621:Karyotyping; D008938:Mitosis; D011123:Polyploidy
D004247:DNA