I'm a sole parent so for a long time it was all on me. As soon as they were old enough I started teaching the kids to help, and now we pretty much share everything. We take turns to do different jobs so the kids learn how to do everything.
It actually surprises me how many of my kids friends (ages 15 and 17) don't know how to do the simplest jobs, i.e. washing dishes, vacuuming. A lot of them would be horrified if anyone suggested they do anything. I wanted my kids to know how to look after a house when they left home, so I made sure I taught them. They take their turns cooking too.
When I was married I worked full time. My then hubby and I had agreed he'd do the majority of the housework as he only worked about 12 hours a week. Unfortunately he just never seemed to know what needed to be done. I would always have to do it all when I got home.
And I really don't agree with this antibacterial obsession that's around. A certain amount of germs is necessary to build your immunity. I do disinfect if there's a stomach bug around, but that's because things like that are really bad for both kids. They both have health issues that make any vomiting thing a huge problem, and possibly fatal. But everyday I definitely don't disinfect.