Four haplotype groups (Haplogroup A, Haplogroup B, Haplogroup C, and Haplogroup D) in the Amerind, but only one haplogroup (Haplogroup A) in the Na-Dene, and confirmed the independent origins of the Amerinds and the Na-Dene. (7688932)
References
Torroni A, Schurr TG, Cabell MF, Brown MD, Neel JV, Larsen M, Smith DG, Vullo CM, Wallace DC. Asian affinities and continental radiation of the four founding Native American mtDNAs. Am J Hum Genet. 1993 Sep;53(3):563-90. PMID: 7688932