Written by: Bjørn Østman
Primary Source: Pleiotropy
Tree structure is derived from taxonomy, where each tip represents all species in a single genus.
Diploid chromosome number is indicated by the height of the innermost ring.
The XY/ZW ring is colored blue for XY and red for ZW taxa.
ESD = environmental sex determination.
The ‘Other’ ring includes parthenogenesis, gynogenesis, and hybridogenesis.
Complex SCS indicates species with complex sex chromosome karyotypes (e.g., X1X2Y).
- All mammals are XY.
- All birds are ZW.
- Half-ish of all fish and no other vertebrates are hermaphrodites.
- Only some fish and some reptiles are environmentally sex determined.
Ashman, T., Bachtrog, D., Blackmon, H., Goldberg, E., Hahn, M., Kirkpatrick, M., Kitano, J., Mank, J., Mayrose, I., Ming, R., Otto, S., Peichel, C., Pennell, M., Perrin, N., Ross, L., Valenzuela, N., and Vamosi, J. (2014). Tree of Sex: A database of sexual systems Scientific Data, 1 DOI: 10.1038/sdata.2014.15
– See more at: http://pleiotropy.fieldofscience.com/2014/06/vertebrate-sexual-systems.html#sthash.7q8HgxsR.dpuf
I am interested in many aspects of evolution. I work in computational biology, using various approaches to learn about fundamental processes of evolution. Bioinformatics is good for learning about real genes (data generously supplied by other researchers), and simulations are good for testing the mechanisms of evolution. I am particularly interested in how populations and organisms adapt to changing environments, both at the genetic and phenotypic level. Lately my research has focused on the evolutionary dynamics of populations evolving in rugged fitness landscapes.
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