A new group-selection model for the evolution of homosexuality
Author: Kirby, Jeff
Source: Biology and Philosophy, Volume 18, Number 5, 200311 , pp. 683-694(12)
Abstract:Abstract. Scientists have long puzzled over how homosexual orientation has evolved, given the assumed low relative fitness of homosexual individuals compared to heterosexual individuals. A number of theoretical models for the evolution of homosexuality have been postulated including balance polymorphism, "Fertile females", hypervariability of DNA sequences, kin selection, and "parental manipulation". In this paper, I propose a new group-selection model for the evolution of homosexuality which offers two advantages over existing models: (1) its non-assumption of genetic determinism, and (2) its lack of dependency on an inefficient altruism relation and family dynamics theory.
Document Type: Research Article
Affiliations: Department of Bioethics, Dalhousie University, 5849 University Ave ., Halifax, NS B 3H 4H 7, Canada jeffrey .kirby @dal .ca
Publication date: 2003-01-01