Question

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 use 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 in 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 the fats in food sources other than fish.

There is a high level of diversity of alleles of the FADS gene in people whose families have lived for many generations in the area of East Africa from which our evolutionary ancestors 2 came. In contrast, there is much less diversity of alleles of the FADS gene in 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. How do anthropologists explain this?

Answer 1

Ans-

FADS gene diversity occurs due to food habbit in that perticular region, who have lived for many generation in a specific area.

FADS gene encodes an enzyme which is known as fattyacid de-saturases. The FADS1 gene is one of 3 fatty acid desaturases. Higher polyunsaturated fatty acids (PUFA) levels are generally correlated with lower risk for heart disease.

An anthropologist can have collection analysis of gene from different diversity of populations and from their evolutionary ancestors.. The analysis shows SNP variations in different geographical area.

Single Nucleotide Polymorphism (SNP) genotyping in the various studies, guided by previous genome-wide association studies shows significant association between fatty acids in serum phospholipids and SNPs in theFADS gene cluster in the gene family. A number of SNPs had been identified in the FADS gene cluster.