am curious to know how the three theories (Leaky Replacement,Multiregionalism and Out of Africa) can explain the racial differences between races (hair color , skin color and eyes color).
The differences are not difficult to explain: they reflect the geographic regions of the peoples. What is less clear is why people are so similar.
I believe you answered that yourself. There never was a real split and interbreeding happened at an early stage. Perhaps continental drift seperated groups, which then went on to develop their own identity, but IMO the differences in our DNA are superficial and the fundamental mix was already established very early in the development of humans.
i.e. the dough mixture can be baked to a cake, a bread, or a cookie…..