Sex differences in fitness and selection for centric fusions between sex-chromosomes and autosomes
- 14 April 1980
- journal article
- research article
- Published by Hindawi Limited in Genetics Research
- Vol. 35 (2), 205-214
- https://doi.org/10.1017/s0016672300014051
Abstract
A model of centric fusions between the X or Y chromosome and an autosome carrying a selected locus is studied. It is assumed that fusions are not associated with any fitness effects, and that all chromosomes disjoin regularly from their homologues. It is shown that a necessary condition for the fusion to be favoured is that there is a selectively maintained sex difference in allele frequencies at the selected locus. If this condition is satisfied, the initial rate of increase of a rare Y-autosome fusion is about three times that of an X-autosome fusion, with the same parameter values. Computer calculations of the final equilibrium states reached by populations containing such fusions were done.This publication has 14 references indexed in Scilit:
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