Why sex? / R.V. Short
Constraints to parthenogenesis / D.Crews
Sexual selection and the evolution of sex differences / J.D. Reynolds and P.H. Harvey
Sexual dimorphism in the Hymenoptera / J.W. Stubblefield and J. Seger
Sex change in fishes - how and why? / D.Y. Shapiro
Teeth, horns and antlers: the weapons of sex / G.A. Lincoln
The evolution of sexual size dimorphism in primates / R.D. Martin, L.A. Willner and A. Dettling
Translating gonadal sex into phenotypic / J.D. Wilson
Sexual dimorphisms in the gonads and reproductive tracts of marsupial mammals / M.B. Renfree
Regulation of sexual dimorphism in rat liver / J.-A. Gustafsson
Sex differences in sounds and their causes / E. Balaban
Brain structure: causes and consequences of brain sex / M. Gahr
Hormone - behavior interactions and mating systems in male and female birds / J.C. Wingfield
Sex differences in the behaviour of African elephants / J.H. Poole.

The costs of sex / T.H. Clutton-Brock
Pheromones: the fruit fly's perfumed garden / J/-F. Ferveur, M. Cobb, Y. Oguma and J.-M. Jallon
Evolution of mammalian sex-chromosomes / M.F. Lyon
Mammaliam sex-determining genes / J.A. Marshall Graves
Bizarre mammalian sex-determining mechanisms / K. Fredga
Environmental control gonadal differentiation / C. Pieau, M. Girondot, G. Desvages, M. Dorizzi, N. Richard-Mercier and P. Zaborski
A man's a man for a'that / R.V. Short
A few chromosamal differences among friends / E. Balaban.