The search for genetic variability of the sex ratio

Abstract

In considering the evolutionary implications of the sex ratio (as opposed to the evolutionary implications of there being two sexes) a dual approach is required. On the one hand we need information about the variability of the sex ratio and to what extent that variability is genetically controlled, and on the other hand we need a theory which embraces the evolutionary consequences of a heritable variability, and which, ideally, is able to account for the observed situation by showing that it corresponds to a stable solution of the theoretical equations.