>>563493
>What if genetic differences occurred because of the fall?
Genetic differences would then mean simple degradation by mutation.
>Also, there is nothing wrong with mixing.
There's cultural and biological reasons to not race-mix. The easiest one to understand is that our immune systems are inherited, meaning that it's accustomed more to certain diseases and viruses than other. When two things adapted to different things mix, it create an inferior product not adapted to anything in particular. Here are some important concepts to understand concerning mitochondrial DNA, stem cell development from root genes and what can happen when you try to mix two really different peoples. Where two genes involved in stem cell formation compete for pole position, you will often find they can thwart proper development of either one of their blueprints. Some genes just don't mix very well. One or the other can occupy the root stem cell but they cannot share influence on development.
The most extreme example lies with Neanderthals. There are a large number of genes involved in the immune response, processing of insulin, fatty acids in brain tissue and in cardiovascular systems that are identified as having originated with Neanderthals but now are implicated in weakened immune systems, diabetes, autism and cardiovascular disease. How many people honestly believe that Neanderthals had feeble immune systems, were diabetics, mentally disabled and had poor lung capacity?