genotypic sex การใช้

• In contrast, squamates ( lizards and snakes ) and turtles exhibit both genotypic sex determination and temperature-dependent sex determination, although TSD is much more common in turtles than in squamates.
• Therefore, marine viviparous species, including sea snakes and, it now appears, the mosasaurs, ichthyosaurs, and plesiosaurs of the Cretaceous, use genotypic sex determination ( sex chromosomes ), much as birds and mammals do.
• Genotypic sex determination is also found in most reptiles, including many viviparous ones ( such as " Pseudemoia entrecasteauxii " ), whilst temperature dependent sex determination is found in some viviparous species, such as the montane water skink ( " Eulamprus tympanum " ).