Hmm. I’m getting a bit of what you’re getting at with biology, and you might be right. But sociology doesn’t become less true when it’s harder to study it, and I’m throwing in my chips with the side that is guessing that most of the time genetics matter less than most people think on issues that can also be effected by societal conditioning.
The sex/gender thing was a correction, you were talking about gendered animals, and animals don’t have genders, they just have sexes. Gender is the societal construction, sex is biological. It’s just a definition/clarity issue—sorry to sidetrack with it!
I had a bit about how it was possible that some animals had gender but decided that was probably nitpicky detail that overcomplicated the issue, which was that the original response to me was confusing sex and gender. Though it’s also possible that some of the animals that you’re discussing actually are just intersex, or that the entire issue is just us anthromorphizing animals, attributing personality traits to be gendered at all because we’re so entrenched in biological determinism that we’re willing to spew that social baggage on everything we touch.