 A 2015 study found that hot temperatures altered the expression of the sex chromosomes in Australia's bearded dragon lizards.The lizards were female in appearance and were capable of bearing offspring, despite having the ZZ chromosomes usually associated with male lizards.In 2018, a team of Chinese and American researchers showed that the histone H3 lysine 27 (H3K27) demethylase KDM6B (JMJD3), an epigenetic modifier, "binds to the promoter of the dominant male gene [DMRT1] to activate male development" in red-eared slider turtles.