ApostateAbe
Veteran Member
- Joined
- Sep 19, 2002
- Messages
- 1,299
- Location
- Colorado, USA
- Basic Beliefs
- Infotheist. I believe the gods to be mere information.
Tendency of range of geographic location of ancestors about ten thousand years ago generally makes a major human race. With minor human races, the ancestral geography would be more recent. Ancestral geography corresponds to genetics, so geneticists can identify races by ranges of frequencies of genetic markers in combination, to match self-identification of race. See, for example, Tang et al's "Genetic Structure, Self-Identified Race/Ethnicity, and Confounding in Case-Control Association Studies," 2004.
Actually no. All of the above is highly disputed among scientists, though I am entire unsurprised that you are the first to answer my question.
But let's even hypothetically assume you are accurate - has anyone done a genetic test on this woman? And either way, at what point do these "ranges of frequencies of genetic markers in combination" shift to make someone "white" vs "black"
Researchers at 23andMe looked at the genetic ancestry of about 78,000 customers likely to consider themselves as entirely of European ancestry and found that somewhere between 3 percent and 4 percent of those people have “hidden” African ancestry.
The percent of African ancestry is relatively low with the majority of individuals having just 0.5 percent to 0.75 percent — which suggests that those people have an African ancestor who lived about six generations, or about 200 years, ago.
Read more at http://blog.23andme.com/ancestry/our-hidden-african-ancestry/#VmmVW2BwlJf91xio.99
Races are spectral, following from the traditional biological usage and following from evolutionary theory, and so I suggest thinking of races much like colors on the profile of a rainbow (not that human races are defined by color). Here is an example of a color spectrum.So, if someone claims to be of a particular race, and you doubt it, 23andMe.com will do a DNA test for 99 dollars and generally sort out whether or not he or she is telling the truth. No need to interview the parents.
The website says it can "learn what percent of your DNA is from populations around the world". So let's say, hypothetically, that her test came back showing that some small percentage of her DNA originates from Sub-Saharan Africa. How large must the percentage be before she can call herself "black"?
Choosing a discrete set of colors based on this can be a problem. You and I can draw vertical lines and make only a few divisions, or we can make many divisions. Maybe we both decide that "blue" and "green" should each be a single color with no subdivisions or intermediates. You draw a vertical line representing where the division should be, and I draw my own vertical line representing where I think the division should be. Very likely, the two lines will not exactly match. They may not even be close. Blue and green, though, are nevertheless objective phenomena. Races are the same way. This is the nature of spectra.
It is plausible that most white Americans have at least a little black ancestry. For black Americans, the mixture is even greater: an average of 20% European ancestry. HOW MUCH mixture it takes to change races is mostly a matter of opinion. But, in the case of this woman, I think the vast majority of people would count her as biologically white and not black. Maybe if you took the hyperbole of the

