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Mechanisms of gonad determination and differentiation in reptiles
Ehl, Jan ; Kratochvíl, Lukáš (advisor) ; Krylov, Vladimír (referee)
Reptiles, as a group, have a~lot of various types of sex-determining mechanisms. Evolution of sex- deter- mining mechanisms took place in different groups of reptiles by different way and got to different types of sex determination. Gene network underlying gonadal diferenciation has been investigated in many studies, for revealing of principles causing this diversity. Thanks to that, it is very difficult to determine ultimate trigger of switching between male of female fate.Interesting fenomenon is sexreversal, which is enabled by mechanism activated only by unusual circumstances. I have summerized basic facts about sex determination in reptiles in this work. Also, expresion patterns of some genes important for gonadal diferenciation in vertebrates, are recapitulated there. The last things, what this work posses, is summary of knowledge about sex-reversal in reptiles and short treatise about its evotution.
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