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Krokodyli gender

Posted on: Maj 25, 2017

You can’t predict the sex of crocodile from its chromosomes. The sex of a crocodile or an alligator depends on the temperature during critical stages in the development of the egg — the same blueprint can be used to create either a male or a female croc.

[…]

Understanding the mechanisms of sex determination in crocodiles and their relatives may become a rather important conservation issue in the near future. The global shift in temperatures due to climate change could have adverse consequences for these reptiles, if populations become very skewed in favoud of one sex over another. Some authors have even speculated that such an effect may have contributed to the extinction of the dinosaurs.

Nessa Carrey, The Epigenetics Revolution: How Modern Biology Is Rewritting Our Understanding of Genetics, Disease, and Inheritance, Columbia University Press, 2013

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