You can't make this stuff up!

[Roy]

While not trying to encourage anything like eugenics, or any sort of the stereotypical gender or racial biases that target oppression or visions of superiority, it is somewhat obvious that there are some fundamental genetic differences between male and female of all species.

Not all species.

Here are some examples where the males and females have exactly the same genes, because they're the same individuals at different stages in their lives. Including the clown anemone fish, which brings a whole new perspective to Finding Nemo.