However I think most of us did not need a molecular geneticist to tell us that.
I had a professor (either of physics or of math, can't recall which) eons ago who described this sort of thing as "intuitively obvious even to the most casual observer". To those of us studying (or actually doing) real science, IOETTMCO isn't good enough, nor should it be. It is much better to have solid proof along with an understanding of the causes, effects, and context of even the most seemingly obvious truth. When some jackass comes along and tries to deny the obvious, we must be able to beat him (or her) down with facts and logic, and show the drastic deadly consequences of his (or her) error. Jumanji Brown Jackass deserves ridicule and scorn for her denial of the obvious that men and women are different and distinguishable.