chapter  7
8 Pages

Evolutionary Origin of Sexual Differentiation and the Sex Ratio

ByH. Kalmus, C. A. B. Smith

Studies of sex ratio usually start from the assumption that it is specifically advantageous for a species to divide itself into two sexes in equal numbers. They then proceed to special explanations why this ratio should break down or be imperfectly realized in particular instances. The purpose of this article is to investigate: (1) why and when a 1:1 sex ratio might be advantageous; (2) how it might have arisen.