Analysis of intraspecific expression differentiation shows that gene expression in males evolves more rapidly than in females. Canton S, Oregon R, Hikone R, a St. Louis-derived isofemale strain and four Zimbabwe-derived lines examined.
Meiklejohn CD, Parsch J, Ranz JM, Hartl DL. Rapid evolution of male-biased gene expression in Drosophila. Proc Natl Acad Sci U S A 2003 Aug 19;100(17):9894-9. PMID: 12907700