Biology 1201A Lecture Notes - Lecture 1: Parapatric Speciation, Reproductive Isolation, Speciation
18 Dec 2017
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Identify distinct species based on the morphological species concept: A & e because they seem to occupy similar phenotypic space. The morphological species concepts would say we have 3 different species based on physical characteristics of each unique population. These physical characteristics were determined using sv-leg ratio charts. Identify distinct species based on the biological species concept: Pictorial representations of the sounds specific from populations use to mate. A & e because they seem to have similar mating calls. All these populations are grouped, and reproductively isolated from those with non-recognizable calls. Type of isolation prezygotic isolation (individuals cannot actually get to the process of mating) If individuals from two different populations are not reproducing, then no gene flow can occur. This can cause genetic divergence in each isolated population. This can be caused by: different selection pressures, different directions of fixation, different mutations. The evolution of new species is a larger scale consequence of micro- evolutionary forces.
