Sex chromosomes: evolution of the weird and wonderful |
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| Authors: | Charlesworth Deborah Charlesworth Brian |
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| Affiliation: | Institute of Evolutionary Biology, School of Biological Sciences, University of Edinburgh, Ashworth Laboratory, King's Buildings, West Mains Road, Edinburgh EH9 3JT, UK. |
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| Abstract: | New findings in the platypus and Drosophila pseudoobscura illustrate, yet again, that the sex chromosomes seem never to stop evolving. Degeneration processes lead to a continual loss of genes and gene activity on the Y chromosome, and complete loss of Y-linked genes is possible if autosomal genes take over control of male fertility - though addition of new material to the sex chromosomes may start the process anew. |
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