Abstract A few species have evolved multiple sex chromosome systems with more than two Xs or Ys due to sex chromosome-autosome translocations. Among vertebrates, frogs (Anura) have the highest known number of such neo-sex chromosome systems, making them interesting for studying how such systems evolve.…
The wolf fish Hoplias malabaricus is a Neotropical species characterized by remarkable karyotypic diversity, including seven karyomorphs (KarA-G) with distinct sex chromosome systems. This study investigated the homologous XY (KarF) and XY 1 Y 2 (KarG) sex chromosome systems present in this species by…
Chromosomal rearrangements play a significant role in the evolution of fish genomes, being important forces in the rise of multiple sex chromosomes and in speciation events. Repetitive DNAs constitute a major component of the genome and are frequently found in heterochromatic regions, where satellite…
Simple Summary Unlike most beetles that have small XY sex chromosomes, the Oedionychina group (Coleoptera, Alticinae) has atypical sex chromosomes, which are called giant sex chromosomes because they are much larger than the autosomes. There is little knowledge about the origin and differentiation of…