I've seen it happen (female myself), though not to my advantage, that I know of.

I've had bugs sent to me for another woman's code, time and again, without formal bug reports for them.

Double edged sword: they know I can fix it, and generally quickly, but it looks like performance is being swept under the rug.

And I do put in bug reports for them once they get to me. Damned if I'm going to have the work unaccounted for.

edit: should probably mention that when she was hired, I was told she would look good at conferences.