BISC208 Lecture Notes - Lecture 6: Neighbor Joining, Gene Flow, Natural Selection
2 Mar 2016
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Document Summary
Speciation was the cause: mosquitos breed fast and in mass quantities, enough time for population to change, c. molestus more closely related to the nearby. How does one population split from another o: allopatric. Physical barrier splitting it into two halves. Distinct features develop based on traits in the reproductively isolated population"s set of traits. Natural selection gives way to changes in the traits of the population moved to a new habitat. New species is created: after equilibration of new ranges, parapatric. A new but adjacent habitat is entered. On the fringe of the old population. Groups are still connected due to environmental similarities. Begin to split off based on slight changes in habitat. New species is created: after equilibration of new ranges, sympatric. Within the old population dramatic genetic changes occur to certain members of the population. The genetic change is dramatic enough to show a divisible difference in species. New species is created: after equilibration of new ranges.
