Which of the following is likely to be more common among americans with ancestors from northern europe because carriers may have possessed protection against cholera?

The association suggested by these questions leads to Cystic Fibrosis, because it is common in the northern European population or with ancestors from that region and because it is preserved in the human genome because it provides a defense to cholera and also tuberculosis.

Explanation:

First of all, we need to understand something here. We were looking for a physiological factor related to cholera protection that is present in northern European descendants. Many factors could fall into this category if we only think in the northern European factor, but when you combine it with cholera. Cystic Fibrosis comes immediately because it has been found that it has been preserved in the human genome to help the individual resist cholera.

gold discovery in california, and pioneer settlers were sometimes pulled west because they wanted to make a better living. others received letters from friends or family members who had moved west. these letters often told about a good life on the frontier. the biggest factor that pulled pioneers west was the opportunity to buy land.

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