The default fluff tends to treat humans as either being influenced by culture than by race or having cultures that are much less monolithic than those of other races, so you would expect gender roles to run the gamut of every conceivable scenario. One thing you should look to as a guide is the role of the sexes in combat; combat is the near-exclusive domain of men in the vast majority of real-life cultures, so female participation in combat can be used as a barometer of gender roles (or lack thereof) in general.

However, there is a very strong correlation between gender equality and racial/cultural Good-ness; most of the PHB races have gender equality to an extent that is unprecedented in real life, while evil races tend to treat women (or men, as the case may be) like property.