True or false?

Suppose you have a PCR amplicon consisting of the sequence below. The primers used to generate the amplicon are: 5'AT3' and 5'GA3'. You can use one of these primer sequences for a subsequent sequencing reaction but not both simultaneously because they will generate sequence information for different nucleotide chains. The chains are complementary but not identical therefore fragments of the same size will be likely to contain different chain terminating nucleotides. For example, 4 base long sequence fragments using 5'AT3' will terminate in a G, whereas 4 base long sequence fragments using 5'GA3' will terminate in a T.

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?