Cytoplasmic inheritance and intragenomic conflict |
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Authors: | Leda Murlas Cosmides John Tooby |
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Institution: | Harvard University, Cambridge, MA 02138, U.S.A. |
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Abstract: | The differing inheritance patterns of cytoplasmic genes and the sex chromosomes from the Mendelian autosomal patterns can be used to divide the genome into fractions whose defining rule is that the fitness of all genes in a set is maximized in the same way. Each set will be selected to modify the phenotype of the organism in a way which maximally propagates the genes comprising the set, and hence in ways inconsistent with the other sets which comprise the total genome. The coexistence of such multiple sets in the same genome creates intragenomic conflict. Evidence is presented in which the fitness of cytoplasmic and other non-autosomal genetic sets are increased at the expense of the autosomal genetic set. The relationship of such intragenomic conflict to the evolution of anisogamy, dioecy, skewed sex ratios, differential male mortality, systems of sex determination, and altruism is discussed. |
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Keywords: | Address for reprints: Dr H E Wichmann and Dr M D Gerhardts Medizinische Universitätsklinik Joseph-Stelzmann-Str 9 D 5000 Köln 41 Germany |
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