Which sex is homogametic in side-blotched lizards? I'm just trying to find out whether the male side-blotched lizard is the hetero- or homogametic sex in side-blotched lizards ( _Uta stansburiana_ ) - some reptiles are ZW system (female heterogamete) and some are XY (male heterogamete).

Lizards of the genus _Uta_ are apparently male heterogametic (XY) (Pennock et al. 1969). The XY system seems to be the most common mode of sex determination in iguanid lizards (Kasahara et al. 1983).

> Kasahara, Y et al. 1983. Chromosome mechanisms of sex determination, G- and C-band patterns and nucleolus organizer regions in _Tropidurus torquatus_ (Sauria, Iguanidae). Genetica 60: 151-156.
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> Pennock, L.A. et al. 1969. Minute Y chromosome in the lizard genus _Uta_ (Family Iguanidae). Cytogenetics and Genome Research 8: 9-19.