Preface; T.A. Markow. Null alleles at two lactate dehydrogenase loci in rainbow trout are associated with decreased developmental stability; R.F. Leary, F.W. Allendorf, K.L. Knudsen. The genetic basis of developmental stability. I. Relationships between stability, heterozygosity and genomic coadaptation; G.M. Clarke. Does heterozygosity promote the symmetry of common white leg markings in the Arabian horse? C.M. Woolf. Associative overdominance: the joint effects of inbreeding and linkage disequilibrium; E. Zouros. Enzyme heterozygosity, metabolism, and development stability; J.B. Mitton. Modification of developmental instability and fitness: Malathion resistance in the Australian sheep blowfly, Lucilia cuprina; J.A. McKenzie, K. O'Farrell. Nonlinear growth dynamics and the origin of fluctuating asymmetry; J.M. Emlen, D.C. Freeman, J.H. Graham. Developmental stability in plants: Symmetries, stress and epigenesis; D.C. Freeman, J.H. Graham, J.M. Emlen. Antisymmetry, directional asymmetry and chaotic morphogenesis; J.H. Graham, D.C. Freeman, J.M. Emlen. Morphological integration of fluctuating asymmetry in the mouse mandible; L. Leamy. Relationship between fluctuating asymmetry, morphological modality and heterozygosity in an elderly Israeli population; G. Livshits, P.E. Smouse. Shaping intraspecific variation: development, ecology and the evolution of morphology and life history variation in tiger salamanders; J.P. Collins, K.E. Zerba, M.J. Sredl. Persistence of subtle departures from symmetry over multiple molts in individual brachyuran crabs: Relevance to developmental stability; A.K. Chippindale, A.R. Palmer. Bilateral variation and the evolutionary origin of macroscopic asymmetries; A.R. Palmer, C. Strobeck, A.K. Chippindale. Evolution, developmental instability and the theory of acquisition; J.A. Kieser. Appearance, fixation and stabilisation of environmentally induced phenotypic changes as a microevolutionary event; V.M. Zakharov. Parental age and developmental stability in Drosophila melanogaster; J. Wakefield, K. Harris, T.A. Markow. Developmental variability and the limits of adaptation: interactions with stress; P.A. Parsons. Parasites increase fluctuating asymmetry of male Drosophila nigrospiracula: implications for sexual selection; M. Polak. Fluctuating asymmetry and sexual selection; A.P. M ller, A. Pomiankowski. Developmental origins of variation in human hand preference; R.A. Yeo, S.W. Gangestad. Behavioral phenodeviance: a Lerneresque conjecture; T.A. Markow, I.I. Gottesman. Minor anomalies: diagnostic clues to aberrant human morphogenesis; H.E. Hoyne. Author index.