Can Sociality Have a Favorite Sex Chromosome?

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Abstract
A number of models have recently been proposed that attempt to explain the origin and maintenance of sex-biased sociality among diploid organisms. Like models of the evolution of sociality in haplodiploid species which rely on relatedness asymmetries, sex-linked altruism models, by assuming a genetic substrate for sociality on sex chromosomes, also rely on asymmetries in (sex chromosome) relatedness to account for observed sex differences in sociality. Sex-linked altruism necessarily entails within-genome conflict and instability leading to suppression of the sociality gene''s activity. These sociobiological models serve to raise some rather basic questions about the levels of selection and even the origin and maintenance of sexuality.

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