Is Gender Only A Social Construct (nurture) Or Is It Due To Our Nature (biology)?

Here’s a tricky question I believe nobody can truly answer.
Personally though, I believe it’s our nature. Two males cannot reproduce – Yet, one male and one female can – and that, naturally, is entirely naturalistic.
But at the same time – Some cultures, in the past and the present see woman as being inferior, weak and worthy only if she serves a man.
This is entirely a social construct (And not one I will ever believe in either.)
Sorry if I’ve misunderstood the question, hope this gives you something to think about ^^