Retrieved August 23, from www. It has been proposed  that temperature acts on genes coding for such steroidogenic enzymesand testing of homologous GSD pathways has provided a genic starting point. Temperature-Dependent Sex Determination in Reptiles The sex of a reptile embryo partly results from the production of sex hormones during development, and one such process to produce those hormones depends on temperature of the embryo's environment.
This paradigm, though, has been recently challenged, with new evidence now emerging that there may indeed be both sex chromosomes and temperature involved in the sex determination of some reptile species. New Jersey: Prentice Hall,
Scientists are still working to understand the evolution of TSD and the implications of climate change for species that exhibit this mechanism of sex determination. Keyword: Search. More examples of context-dependent sex determination will be studied in Chapter From Wikipedia, the free encyclopedia.
Charnier, Madeline. Nicole Valenzuela and Valentine Lance, 5—8. Clear Turn Off Turn On.
Charnier observed that temperature affected sex ratios, which are the number of females versus males in a population or a single clutch of eggs, of the rainbow Agama lizard, Agama agama. Sex Chromosomes and Sex-Linked Genes. Temperature-dependent sex determination in reptiles While the sex of most snakes and most lizards is determined by sex chromosomes at the time of fertilization, the sex of most turtles and all species of crocodilians is determined by the environment after fertilization.