Final answer:
The pairwise Fst is a measure of genetic differentiation between populations, calculated by comparing allele frequencies at different loci within and between populations in GenAlEx 6.5.
Step-by-step explanation:
The pairwise Fst is a measure of genetic differentiation between populations. In GenAlEx 6.5, it is calculated by comparing allele frequencies at different loci within and between populations.
This measure takes into account the genetic variation within populations and the genetic variation between populations.
For example, let's say we have two populations, A and B, and we are interested in studying a particular gene. We can calculate the pairwise Fst by comparing the allele frequencies at that gene in population A and population B.