Haplogroup M3

This group appeared 10,000 to 15,000 years ago. M3 was a result of a genetic change after M242 crossed into the Americas. It defines most of the American lineage. The majority of native North America and practically all of native South America are M3 descendants.

The only non M3 lineages are the original coastal migrants defined by M130 who first populated the south east Asian coast and Australia. This occurred around 6,000 to 8,000 years after these people moved along the east Asia coastline. This was long after M242 arrived and acquired M3.

It can be concluded that because M3 is found in only one continent and M242 is found in both that it was acquired after American settlement. It is also likely that this occurred after the closing of the Beringia land bridge around 10,000 to 15,000 years ago.