The correct answer is Analysis of DNA suggests the Americas were settled by more than one haplogroup—a lineage marked by one or more specific genetic mutations.
United States is one of the main countries of attraction for immigrants in the world. Recently the country has been receiving a high number of immigrants, one of the largest in history. The migratory flow has led the nation to a major structural, population and social transformation.
To get a sense of what is happening in the United States, has emerged in the country. According to estimates, the number of immigrants (legal and illegal) living in the United States is approximately 28 million people, in 1930 that portion of the population was three times smaller.
The Center for Immigration Studies released data on the number of immigrants in the United States, who said that about 1.2 million people arrive in the United States each year. Today, about 10% of the country's population is immigrant, a high number, considering that the last time this occurred was in the early 20th century, a few decades before the Second World War.