You may have heard that fish is good brain food This is true

You may have heard that fish is good brain food. This is true; fish contain the kinds of fatty acids that are the right length and level of saturation for use in the cell membranes of nerve cells. When you eat fish, your body can take the fatty acids in the fish and us e them for your brain cell membranes, without needing to chemically modify their leng th or level of saturation. When you eat sources of food other than fish, your body needs to convert the fatty acids i n those foods into fatty acids that are the right length and level of saturation so your brain can use them. The protein that is made by the FADS gene allows us to make good brain fats from t he fats in food sources other than fish. There is a high level of diversity of alleles of the FADS gene in people whos e families have lived for many generations in the area of East Africa from which our evolut ionary ancestors 2 came. In contrast, there is much less diversity of alleles of the FADS gene i n people whose families have lived for many generations in inland areas that lie a moderate distance away from this area in East Africa, and much farther away from sources of fish. Further , the gene alleles you find in people from the more inland areas of Africa are mostly the gene alleles that produce a high level of activity in the FADS protein. How do anthropologists explain this?

Solution

Hi,

I hope my answer is satisfactory.

Thanks!!