Absolutely nothing happened. She just said “sorry I mistook you for someone else” and I never saw her again.
Though I do remember I once mistook a random guy for one of my friends and showed him a meme. Then I realized he wasn’t my friend and he said “Sorry I’m not that guy, good meme though”
Obligatory “I’m not a biologist” disclaimer
You could take an X chromosome from both parents either way. And I’m pretty sure all the other chromosomes wouldn’ make that much of a difference