A closer look at SNPs suggests difficulties.
Pennisi
E
E
D001483:Base Sequence; D005006:Ethnicity / Q000235:genetics; D005819:Genetic Markers; D020022:Genetic Predisposition to Disease; D005821:Genetic Techniques; D014644:Genetic Variation; D005826:Genetics, Medical; D015894:Genome, Human; D006801:Humans; D017354:Point Mutation; D011110:Polymorphism, Genetic; D011995:Recombination, Genetic
D005819:Genetic Markers