 When they tested ancient DNA remains found in the Americas of the individuals named USR1, Anzick-1 and Laranjal-6700 the results showed that they carried the ancestral A-allele.While the remains of Cuncaicha and Lauricocha 2 ancient individuals from South America dating back 11,000 years ago share alleles at the highest rate with present-day amerindians.That means the derived G-allele increased in frequency in parallel with the ancestral A-allele.