provide information about rates of migration
among populations. SNPs that show unusual
patterns of genetic variation may indicate
regions of the genome that are subject to
selection.
a. Will loci involved in local adaptation, such
that different alleles are favored in different
populations, show unusually high or unusu-
ally low values of FST between populations?
Explain your answer.b. What could account for SNPs that show
high heterozygosity within populations,
but unusually low values of FST between
populations?
c. Even when thousands of SNPs are scored,
many of the SNPs that are the actual targets of
selection are often not genotyped. However,
even SNPs that are selectively neutral can be
used to detect regions of the genome that
are locally adapted. Why?08_EVOL4E_CH08.indd 211 3/23/17 9:13 AM