Genetic Changes at the Transferrin Locus in the Red-Backed Vole (Clethrionomys Gapperi)

. These observations have provided the best corroborative evidence for alternating patterns of selection during population cycles (the polymorphic behavior hypothesis: Researchers have nevertheless failed to correlate frequency changes with individual components of fitness. Genotypes often differ little in terms of behavior Differences in growth or survival sometimes account for changes at one locus, but fail to account for similar changes at another locus Manipulations of gene frequencies in artificial (Gaines et al., 1971) and natural populations