Ross et al. Expression profile of a degenerating neo-Y chromosome in Drosophila. Genetic evidence supporting the existence of two distinct species in the genus Gasterosteus around Japan. Cytotaxonomic studies in Cyprinodontidae: multiple sex chromosomes in Garmanella pulchra.
For example, when an autosome fuses to a Y chromosome, this creates an X 1 X 2 Y sex chromosome system White Y-A fusion; closely related, sympatric species G. Skip to main content.
A similar fusion has occurred in the blackspotted stickleback G. Volff, J. Thus, the presence of genes with sexually antagonistic effects on an autosome might select for the evolution of a new sex-determination locus on that autosome, the transposition of an existing sex-determination locus to that autosome, or the fusion of that autosome to an existing sex chromosome.
These data suggest that the fusions have occurred independently in the two stickleback lineages. Sex determination in the teleost fish O. Y-A fusion; closely related, sympatric species E. Reporter's comments Although more work is required to define the Y-specific gene identified by Matsuda et al.
Reduced adaptation of a non-recombining neo-Y chromosome. Suzuki et al. Reprints and Permissions. In: Ledoux L ed Genetic manipulation with plant material. Cytogenetical studies on fishes.
Finally, although centric fission of the X chromosome can result in the formation of an X 1 X 2 Y system Fig. For example, when an autosome fuses to a Y chromosome, this creates an X 1 X 2 Y sex chromosome system White Here, we review multiple sex chromosome systems in fishes, as well as recent advances in our understanding of the evolutionary role of sex chromosome turnover in stickleback speciation.
Published : 27 August Finally, neo-sex chromosomes created by fusions provide a great system to study the early stages of sex chromosome evolution. Cytogenetic studies of Brazilian marine fish.