sex but also the sex appeal of leopard geckos. According to Crews there are five types of sex: chromosomal, gonadal, hormonal, morphological and behavioural. They don’t necessarily all agree with one another or even remain fixed for life. They are cumulative and emergent in nature, and can be influenced by genes or hormones, as well as the environment or even an animal’s life experience. This plasticity allows for the huge variety in sex and sexual expression that we see both within and between species.
