No, this behavior is likely not biological. It's not a universal behavior, there are cultures where this phenomenon is reduced or completely lacking. That means it is likely a social construct, not biological.
There are social constructs but I would not deny biology. Effect of testosterone and estrogen on behavior has been studied extensively and it is quite clear from that why men and women behave the way they do.
Is women avoiding STEM a social construct? It most definitely is. Is women having lower salaries a social construct? In some cases yes, in some cases it is quite clear that they are not as risk taking as men, and are much more agreeable (they will not risk by asking a higher salary during a job interview).