In the early 1800s, many people in the united states migrated westwards because

In the early 1800s, many people in the United States migrated westwards because of the availability of farmland.

Explanation:

The US government made policies to encourage the move of American citizens to the west of the country.

For example, the government giving lands to people that had the willpower to move to that side of the country.

fmr1 gene that can lead to fragile x-associated disorders.

explanation:

it would have to be gasioline