What do the 12 Tribes look like?
It is commonly accepted by scientists and historians alike that the dominant gene of Homo Sapiens is that of what is referred to as Negroid. The original inhabitants of the Earth were all of the Negroid gene pool as were the 3 sons of Noah, Shem, Ham, and Japheth. As plagues and viruses spread across the Earth due to improper eating and mating habitants, the skin disease of leprosy became a pandemic.
Those of the Levitical Priesthood under the leadership of Moses (M’sha) were instructed to gather up the lepers among the Israelites and conduct a cleansing. This was the beginning of the various ‘hues’ of the said human being.
Leviticus 13 (KJV)
1 And the Lord spake unto Moses and Aaron, saying,
2 When a man shall have in the skin of his flesh a rising, a scab, or bright spot, and it be in the skin of his flesh like the plague of leprosy; then he shall be brought unto Aaron the priest, or unto one of his sons the priests:
3 And the priest shall look on the plague in the skin of the flesh: and when the hair in the plague is turned white, and the plague in sight be deeper than the skin of his flesh, it is a plague of leprosy: and the priest shall look on him, and pronounce him unclean.
As these lepers were pronounced unclean they were put away for periods of 7 days and then looked upon afterwards to determine if the plague had passed. When the leprosy had covered the entire body they were pronounced clean and were able to once again intermingle with society. These cleansed lepers then mating with fully healthy aboriginal Israelites of the dominant gene pool, began creating offspring of various shades of skin colors.
Leviticus 13 (KJV)
17 And the priest shall see him: and, behold, if the plague be turned into white; then the priest shall pronounce him clean that hath the plague: he is clean.
The important thing to remember is that these were Israelites of the dominant gene pool that the Levitical Priesthood first conducted these cleansing processes on.