Levels of expression of the foraging gene (for; Expression) in
two worker types (type) in three bee colonies (colony). Note
that colony is not coded as a factor.
Arguments
source
Ben-Shahar, Y., A. Robichon, M.B. Sokolowski, and G.E. Robinson.
2002. Influence of gene action across different time scales on behavior.
Science 296: 741-744.