... of Sox9 / SOX9 have been reported in mice and humans. In particular, the binding of SRY to the highly conserved enhancer Enh13 is thought to be a common mechanism underlying testis differentiation and sex determination in mammals. Methods: Sequences of T. osimensis homologues of three Sox9 enhancers...

...Artem P. Lisachov; Massimo Giovannotti; Jorge C. Pereira; Daria A. Andreyushkova; Svetlana A. Romanenko; Malcolm A. Ferguson-Smith; Pavel M. Borodin; Vladimir A. Trifonov Reptiles show a remarkable diversity of sex determination mechanisms and sex chromosome systems, derived from different...

... hypothesized that Sox3 , which is thought to be originally a homologue of Sry , could function in sex determination in these animals in the absence of Sry . Sox3 was localized in a region of the X chromosome in T. osimensis homologous to mouse. A similar testis- and ovary-specific pattern of expression...

... fluorescence in situ hybridization. We test hypotheses of sex-determining mechanisms in Emys by comparative genomic hybridization to determine if Emys has a cryptic sex-specific region. Our results provide valuable data to guide future efforts on genome sequencing and anchoring in Emydidae...

...Michael Schmid; Claus Steinlein A detailed cytogenetic study on the leaf litter frog Eleutherodactylus johnstonei from 14 different Caribbean islands and the mainlands of Venezuela and Guyana revealed the existence of multimorphic XY♂/XX♀ sex chromosomes 14. Their male sex determination...

... turnovers in sex determination. We evaluate the published literature and newly collected comparative cytogenetic data (G- and C-banding, 18S-NOR, and telomere-FISH mapping) from 13 species spanning 2n = 28-68 to revisit turtle genome evolution and sex determination. Interstitial telomeric sites were...

..., quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements. Telomere Interstitial telomeric repeats Xenodermus Sex determination Sex...

...M. Pokorná; W. Rens; M. Rovatsos; L. Kratochvíl Geckos (Gekkota) are a highly diversified group of lizards with an exceptional diversity in sex-determining systems. Despite this intriguing documented variability, data on sex determination in many lineages is still scarce. Here, we document...

...R.B. Phillips Most of the information on sex chromosomes in salmonid fishes is for species in the 3 genera of the subfamily Salmoninae found in North America: Salvelinus, Salmo and Oncorhynchus . All of the species are male heterogametic with XY sex determination. Morphologically distinguishable...

... determination in animals and our emerging understanding of how animal sex determination systems may hamper or enable polyploidization, including some recent data on haplodiploids. We discuss the role of polyploidy in evolution and ecology, using a gene regulation perspective, and conclude with a synopsis...

... to in the content or advertisements. Cot-1-DNA FISH Meiosis Sex determination The presence of 1–2 chiasmata appears to repeat in the few species of Neotropical fish analyzed thus far [Gross et al., 2009; Matoso et al., 2011]. G. pantanal follows this rule, exhibiting 1–2 chiasmata...

... were found among tissues for some individuals, and some individuals that were all-diploid or all-triploid in blood were found to be mosaic in other tissues. Triploidy was statistically associated with males, and we hypothesize that genome size plays a role in sex determination in this species. 17...

..., after a paracentric inversion occurred at the breakpoints between the distal region of 18S-28S rDNA and the proximal region of SBNO1 on the Z chromosome. Chicken Chromosome homology Chromosome rearrangement Comparative mapping FISH Reptile Sex chromosome Sex determination Turtle ZW...