Why does meiosis result in more genetic variation than mitosis?

It would be wrong to consider mitosis insignificant as it helps in cell repair and replacement in our daily life and it would be impossible to survive without it and asexual reproduction as well but if it weren't for meiOSis, none of us would have been born :) MeiOSis is responsible for the division for our gamete cells which leads to the formation a zygote. from there on mitosis takes over.