Note that only some Gehyra australis populations possess heteromorphic sex chromosomes [ King, ]. Kluge AG. Heteronotia binoei [ Moritz, b ] and Lepidodactylus lugubris [ Volobouev and Pasteur, ]. It is possible that the 6 cells with 2n less than 41 were the result of some technical inaccuracy.
These taxa can be coded as having either one of these states using the parsimony criterion. Sex determining mechanisms are labeled as either TSD, temperature dependent sex determination, or GSD, genetic sex determination.
Some taxa have master-switch sex-determining genes that are highly conserved, such as the Sry gene in nearly all mammals . Additional L. It is also possible that the additional chromosomes may be supernumerary or B chromosomes.
The pathways that control sexual development have been well characterized at the molecular level in D. Gamble T. Sex determining mechanisms are well characterized for several a review of sex determining mechanisms in geckos in Aurora of Eublepharidae, most notably TSD in the leopard gecko, Eublepharis macularius.
Why is sex determined by nest temperature in many reptiles? The molecular evolutionary tree of lizards, snakes, and amphisbaenians. The maximum likelihood approach to reconstructing ancestral character states of discrete characters on phylogenies.
Sex Chromosomes and Sex-linked Genes. The origin and evolution of parthenogenesis in Heteronotia binoei Gekkonidae. On the organization of individual differences in sexual behavior. The maintenance and breeding of the leopard gecko Eublepharis macularius as a laboratory animal.
Reproduction and the mechanism of meiotic restitution in the parthenogenetic lizard Cnemidophorus uniparens. Articles from Sexual Development are provided here courtesy of Karger Publishers. Ota et al. King and King, Cytotaxonomy and Vertebrate Evolution. There were still 5 independent origins of TSD within the sampled taxa.