letmeexplainA series of five studies among both adults and children show that brilliance is automatically more associated with men than women in people's minds. Although people explicitly stated they do not believe that men are more brilliant than women, traits such as genius, brilliant and super-smart were implicitly more consistently linked to men than women. 

For a clear explanation of how the widespread stereotype that brilliance is a characteristic of men holds back the career development of women, see the following article in Forbes here.

Storage, D., Charlesworth, T. E., Banaji, M. R., & Cimpian, A. (2020). Adults and children implicitly associate brilliance with men more than women. Journal of Experimental Social Psychology90,  104020. https://doi.org/10.1016/j.jesp.2020.104020