article_snippet: Meanwhile, the Caribbean Islands of Puerto Rico and the Dominican Republic are genetically similar to each other and distinct from the other populations.
article_snippet: The left image shows how much European ancestry is in the Americas, while the left image relates to American ancestry.
article_snippet: The bars are colour coded to match the map above.  
article_snippet: - Puerto Rico and the Dominican Republic are genetically similar to each other and distinct from the other populations, probably reflecting a different migration pattern between the Caribbean and mainland America. -
article_snippet: The researchers say this probably reflects a different migration pattern between the Caribbean and mainland America.
article_snippet: The differences in European ancestry between the Caribbean islands and mainland American population that we found were also previously unknown.
article_snippet: It is likely that these differences reflect different patterns of migration between the Caribbean and mainland America. '