Cole C J, Lowe C H, Wright J W
Science. 1967 Feb 24;155(3765):1028-9. doi: 10.1126/science.155.3765.1028.
Karyotypes of many species of the genus Sceloporus support the generalization that there are no morphologically recognizable sex chromosomes in lizards; however, there is a marked sexual dimorphism in the karyotypes of Sceloporus jarrovi and Sceloporus poinsetti. During meiosis in males, whose diploid number of chromosomes is 31, preferential segregation of chromosomes from a trivalent results in heterogamety.
鞭尾蜥属许多物种的核型支持这样一个普遍观点，即蜥蜴中不存在形态上可识别的性染色体；然而，雅罗鞭尾蜥和波因塞特鞭尾蜥的核型存在明显的性二态性。在二倍体染色体数为31的雄性减数分裂过程中，三价染色体的优先分离导致了异配性别。
