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Unformatted text preview: ii. Ecological isolation – the whole organism or the gametes are not located in the same place. iii. Behavioral isolation – no sexual attraction iv. Mechanical isolation – unique reproductive parts v. Gamete mortality – copulation but no fertilization b. Post zygotic barriers i. Hybrid in-viability – no development of the embryo or you might develop offspring that are frail/weak ii. Hybrid sterility D. How do reproductive barriers form? Stop gene flow between 2 populations but mutation, natural selection, genetic drift act independently in each population. a. Allopatric speciation – “other homeland” physical or geographical barrier. i. Two species from one ancestral species = divergence ii. A burst of divergences from a single ancestor that least to many new species each adapted...
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This note was uploaded on 05/18/2011 for the course BIOL 101 taught by Professor Hogan during the Spring '08 term at UNC.
- Spring '08