The Ancient North Eurasian component is one part — a substantial but not dominant part — of the founding mixture that produced the ancestral population of the Americas.

The East Asian component is at least equally important, probably more so in terms of proportional contribution to the founding genome.

The specific proportions vary across different Native American populations and are still being refined by ongoing research.

The connection is ancient.

The mixing that produced the founding population happened in Asia, tens of thousands of years before the first human beings set foot in the Western Hemisphere.

The subsequent history of Native American populations — the thousands of years of separate development, migration, cultural elaboration, and demographic change within the Americas — is not captured by the MA-1 finding.