If my parents never met and married different people, would I have been my dad's child or my mom's child?

Answer 1

nope you would still be on here trolling this question daily

Answer 2

Tough question: You physical body and past chain of events, makes the current You.

If your parents never met and married to different people then your physical body will never been born.
Even small change in past chain of events will never result in same You even if your parents met and married to each other.

Answer 3

You would not exist.