If this scenario were to happen, it instantly does away with crotch-sniffing feminists. 99% of the female populous is weaker than 99% of the male populace. It's a fact of life and while perhaps women haven't been portrayed in the best light here, I'd give the show close to 85% realism.
Women can kill zombies (via firearms) just like men can but they would not be as successful, (sans training) as men are with hand-to-hand combat because they are smaller and weaker.
Get the **** over it.
And on another subject that relates...
I'm betting Michonne used to be a cop or had some other male dominated career.
Bank on it.
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