Response
The Bible does not explicitly provide the origin of the different “races” or skin colors in humanity. In reality, there is only one race—the human race. Within the human race, there is diversity in skin color and other physical characteristics. Some suggest that when God confused the languages at the tower of Babel (Genesis 11:1-9), He also introduced racial diversity. It is conceivable that God made genetic alterations to humanity to enhance people’s ability to survive in various environments, such as Africans having darker skin that is genetically better suited to endure the intense heat in Africa. According to this perspective, God caused linguistic segregation by confusing languages and then introduced genetic racial distinctions based on where each racial group would eventually settle. While this is a possibility, there is no explicit biblical support for this theory. The races/skin colors of humanity are not mentioned in connection with the tower of Babel.
During the construction of the Tower of Babel, as different languages emerged, groups speaking the same language dispersed together. Consequently, the gene pool of a specific group significantly decreased as they no longer intermixed with the entire human population. This led to increased inbreeding, resulting in certain features being accentuated in these distinct groups (all of which were potential in the genetic code). With successive generations and continued inbreeding, the gene pool diminished, leading to individuals within a language group sharing similar or identical features.
Another theory suggests that Adam and Eve carried the genetic potential to produce offspring of various skin tones, including black, brown, and white (and everything in between). This is akin to how children of mixed-race couples can exhibit a range of skin colors. Since God evidently intended for human beings to possess diverse characteristics, this genetic diversity could have been present from the beginning.In the ability to be diverse in appearance, it makes sense that God would have given Adam and Eve the ability to produce children of different skin tones. Later, the only survivors of the flood were Noah and his wife, Noah’s three sons and their wives—eight people in all «In the selfsame day entered Noah, and Shem, and Ham, and Japheth, the sons of Noah, and Noah’s wife, and the three wives of his sons with them, into the ark; », (Genesis 7:13). Perhaps Noah’s daughters-in-law were of different races. It is also possible that Noah’s wife was of a different race than Noah. Maybe all eight of them were of mixed race, which would mean they possessed the genetics to produce children of different races. Whatever the explanation, the most important aspect of this question is that we are all the same race, all created by the same God, all created for the same purpose—to glorify Him.