Putative Sex-Determining Genes Virtually all studies of the molecular biology of sex determination in reptiles have examined homologs of sex-determining genes first identified in mammals. Physiological and Biochemical Zoology. It is quite possible that there are other species of reptiles with more complicated scenarios of temperature reversal of chromosomal sex.
A few other genes also deserve mention.
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. Heritable variation for sex ratio under environmental sex determination in the common snapping turtle Chelydra serpentina Genetics.
Studying the spotted skink, they observed that the highland population was not affected by temperature, yet, there was a negative correlation between annual temperature and cohort sex ratios in the lowlands. Categories : Herpetology Sex-determination systems.
Home Ocean Facts What causes a sea turtle to be born male or female? This approach has recently been used to deliver busulfan to ablate germ cells within the developing gonad [ Dinapoli and Capel, ]. Already a subscriber?
The accepted hypothesis of XY and ZW sex chromosome evolution is that they evolved at the same time, in two different branches. Transactions of the Royal Society of Edinburgh. Thermoregulation is the ability of an organism to keep its body temperature within certain boundaries, even when the surrounding temperature is very different.
Some animals undergo one of various forms of dormancy where the thermoregulation process temporarily allows the body temperature to drop, thereby conserving energy. Cambridge University Press,p.
Agamidae and Eublepharidae [ Viets et al. Steroid signaling and temperature-dependent sex determination — reviewing the evidence for early action of estrogen during ovarian determination in turtles. Sex determination and differentiation.