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Since the Caucasian genes are recessive, this is how it turns out nearly every single time in these kinds of offspring, the child looks nothing like the white parent. From a strict biological and natural selection point of view, the purpose of reproduction is solely to spread your genes into the future. In the scenario above, what she has done is basically pass on her genes as non-influential junk DNA, while the African genes determined almost the entire outcome of the child where it doesn't resemble one of the parents at all.
Of course there will be tons of Marxists coming along to claim that mentioning African genes are dominant and Caucasian and Asian genes are recessive is "da raycism", because it doesn't take a genius to figure out that whatever genes compromise the recessive groups would basically be made extinct by full integration between all groups. This infuriates the common Marxist because it blows the lid off their fake narrative where those groups of people tend to constantly push for things like conservation of variety in animal species, yet they would be pushing for the exact opposite in this case, the extinction of the recessive human groups on purpose.
As the father of 3 mixed children myself (wife is Asian and I am white) I have to call you out on this. Despite my own very recessive traits very light brown/dark blond hair and blue eyes and my wife's "dominant genes" dark black hair and dark brown eyes my genetic contribution is quite obvious. Two of my children have a brown hair as opposed to my wife's black and though all three of my children have brown eyes they are a far lighter shade of brown then that of my wife. People often ask my wife if her husband is western after seeing my children as they can tell they are mixed.
There would be no "extinction" of certain features in the case of complete mixing of the population. Recessive traits would simply get increasingly rare and only up to a point. For example, blue eyes would get rare but would not vanish completely. As they are considered by many to be attractive the reproduction advantage of having them would increase as they became increasingly rare causing blue eyes to gradually spread through the population over time.
The largest advantage of marrying someone that is not similar to you genetically is the dilution of harmful recessive genes. Mixed children have been shown receive both a height and an IQ advantage which is thought to be due to the dilution of harmful recessive genes.
http://www.dailymail.co.uk/sciencetech/article-3146070/Mixed-race-relationships-making-taller-smarter-Children-born-genetically-diverse-parents-intelligent-ancestors.html
Also like most everybody looks better with a tan.
