This is the first demonstrated report of a biomolecule associated with regulation of the very unique temperature-dependent sex determination mechanism. Hormone Research. Sign up for our email newsletter. When two species of turtles were raised at female-promoting temperatures, Sox9 expression was down-regulated during the critical time for sex determination.
Temperature-dependent sex determination in reptiles While the sex of most snakes and most lizards is determined by sex chromosomes at the time temperature dependent sex determination in crocodiles nightclub in New Brunswick fertilization, the sex of most turtles and all species of crocodilians is determined by the environment after fertilization.
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Sexual Development. The extent of the TSP varies a little among species,  and development within the oviducts must be taken into account in species where the embryo is at a relatively late stage of development on egg laying e. Categories : Herpetology Sex-determination systems.