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(02-10-2018 01:07 AM)GoingTheDistance Wrote:  

I just want to note that I'm only replying because I was specifically quoted.
Yes I know what causes blue eyes. Blue eyes are also a recessive trait. 99% of the time a mixed child between a white and a black or asian will not have blue eyes.
The picture that you showed, that's a black guy. His eyes aren't blue either they are that weird mix that you usually see in the 5% of mixed raced children who don't get the 100% dark eyes. He does not even come close to resembling a white ethnic European in any way shape or form.
You say the children's skin color usually come out halfway between the parents and the children - Ok, but 99% of the time they still are of the minority skin color. That picture that you posted, he's not "half white" or "half black". He is black. Nobody would look at that man and say mistake him for a European.
Obama is definitely a black guy. I don't care what color he is considered in certain parts of Africa. Put him in any European country and Obama is black. Obama in no way shape or forms resembles a person of European ethnicity. He in every way resembles a person of African ethnicity.
I don't say any of this to be malicious. My point is that the majority of the time it takes generations to go from a darker skin color to a white skin color because European genes are recessive. The reason that I wrote about this in the first place is well covered in my previous posts in relations to the T-Mobile commercial.
EDIT - I'm sorry that you think "In the US we have this bullshit one drop philosophy where people who are 80% European ethnically are considered black", but maybe that's because it's true from our countries perspective. Given that the Europeans founded the nation that is the USA about 250 years ago, that is a legitimate philosophy for us to have as a country.
By the way, while that "bullshit philosophy (in the USA) where people who are 80% European ethnically are considered black" might not be shared exactly alike in Asia and Latin America, our three regions views on race are more similar than not. In no way shape or form is Obama considered white in Latin America or Asia, nor is that guy who you showed in the picture.

You are exclusively looking at the first generation. If for example you have two people who are both half black like Obama... their children have a 25% of being blue eyed, but a 75% chance of passing on the blue eye gene.

See here is the thing about recessive genes. They are virtually impossible to breed out of a population. They will reduce in frequency, but still continue to pop up. Dominant genes when they become unpopular are easily stamped out of a population.

Here is a chart that shows second generation percentages. The brown parent is heterozygous.





Skin color is co-dominant, and that's because the gene works differently. It's actually polygenic. That means it is controlled by multiple alleles at different loci. This is why skin color is less random, and why if you have a child with a black woman the childs skin tone will not be black, nor will it be white.

When you say it takes a long time to breed dark skin colors out. Technically it takes 2 generations, which isn't a big deal. Here is a chart that shows skin colors. As you can see they exist on a bell curve.



I just had a daughter. Her mother is Asian, and I'm ethnic white. My daughter has hazel colored eyes, blond hair, and white skin. Her facial features are a blend of both parents. The Asian side of the family thinks she looks very European. My family of course thinks she looks very Asian. Neither is true. People are always a blend of both parents.

I will also say this. When you look at genetic inheritance, it is my personal belief that the majority of genes come from the mother.