Gender is innate and evolved; it is not the result of ‘socialisation’, as the blank slate ideology contests. No serious scientist believes the blank slate hypothesis now, other than a few contrarians who allow their political beliefs to overshadow their rigour. The notion that gender — along with a raft of human behaviours — is ‘socialised’ has been completely, comprehensively and utterly debunked, for over 60 years.
Anyone who has experience of dealing with animals knows that male and female animals are very different, not just in the way that they look, but the way that they behave. In other words, they display innate gendered behavioural traits. Males tend to be more aggressive, females more nurturing.
This applies no less to humans.