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Thursday, April 7, 2011

sympatric speciation

* Population inhabiting the same geographic region speciate in the absence of a physical barrier between them.



red fish

blue fish


pictures above : Mutations in genes that affect female's perception of color of ambient light in deeper or shallower regions of lake also affect their choice of mates. 
** Female cichlids prefer to mate with brightly colored males of their own species


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