Question

Except for identical twins, all the other human beings are genetically distinct from each other. Why is this true?

Answer 1

When ever the sex cells go through reproduction,  our 46 cells come together to make about .01% of us, in that is everything about us, eye color, skin color, hair color, emotions. So really we all are barely different.

Answer 2

It's because of sexual reproduction,
this causes everyone to get unique DNA patterns, (except for twins, which from by one fertilised egg splitting into 2). 50% from mum 50% from dad