@JBeukema,
JBeukema;67342 wrote:Incorrect. SNPs can trace one's ancestry and ones mix of the three major races with 95+% accuracy
Sorry, this is incorrect there are no human "races" the term is a misnomer. When biologists are talking about a race what they are really talking about is a subspecies, all humans on earth belong to the same subspecies....homo sapien sapiens.
Quote:Yes, you can. They're called Single Nucleotide Polymorphisms. That's why DNA evidence can tell police they are looking for a white male suspect. It's the same method used in paternity tests. In The Journey of Man, SNPs are used to trace large-scale human migrations in the past.
SNP alleles are not exclusive, what they are doing is looking for a remnant that is common for a particular geographical location. For example, you could find an SNP allele that is very common among those with central african descendents but much rarer among other peoples, it only identifies this within a certain degree of accuracy.
Quote:Incorrect. They would share a common trait because either they share a common ancestor or because of similar evolutionary pressures coupled with similar mutations.
Well, all humans share a common ancestor and to a greater extent all life shares a common ancestor.
I will give you an example, those with ancestors closer to the equator have darker skin. Do all dark skinned people share a common ancestor that lighter skinned people do not? No, not to any great extent.