Biology 1201A Lecture Notes - Lecture 2: Parapatric Speciation, Sympatric Speciation, Genetic Drift
24 Apr 2018
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If they(cid:859)re (cid:374)ot reprodu(cid:272)i(cid:374)g, the(cid:374) there is no gene flow diverge in an evolutionary sense. Genetic drift may happen in both populations, but they may fix in different ways. Different mutations in different populations selection, sampling drift could now act on these: macroevolution evolution of new taxanomic groups. Result of regular microevolutionary processes, but larger scale. Individuals of the same species are reproducing, therefore they share characteristics in common therefore they(cid:859)re pro(cid:271)a(cid:271)ly shari(cid:374)g physi(cid:272)al traits and biological concepts. Could have two species that look similar but are different. Here the song and the morphological characteristics woud likely indicate the same species. Applying modes of speciation create a story: allopatric speciation genetic barriers. Did the populations that get split diverge enough to become separate species: microevolution founder effect. Just came in, already different: hybridization. D is hybrid of e and c. Or more of an intermediate that allows gene flow: sympatric speciation. Maybe c and d were once two different species.
