XX and XY chromosome: What are differences in sex development?
![XX and XY chromosome: What are differences in sex development?](https://static.independent.co.uk/2024/08/02/14/shutterstock_2442765865-copy.jpg?width=1200&auto=webp)
‘Is sex something that you can see depending on which hormone, estrogen, or testosterone you preferentially produce? No, it’s not. Sex is much more complicated,’ expert tells Maya Oppenheim