Oct16_Speciation2 -...

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7. Understand the processes that reduce (or end) gene flow and therefore  facilitate populations becoming reproductively isolated C.  Explain  why gene flow makes speciation by reproductive isolation less likely D.  List  and  define  the 5 types of prezygotic and 2 types of postzygotic barriers to  reproduction E.  Recognize  different isolating mechanisms when presented with examples G.  Differentiate  allopatric and sympatric speciation
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Announcements Exam is a next Monday Deadline to sign up for the conflict exam is  TODAY Online HW #5 is due Monday morning at 8  am
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The set of processes by which new species form A two step process: 1. Reproductive isolation 2. Divergence This is (almost) always a  process , not an  event Many ways to reproductively isolate populations Allopatry vs. sympatry 5 prezygotic and 2 postzygotic mechanisms Speciation
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Allopatry – Populations or species that live in different  geographic areas - mating is physically impossible due to geographic  isolation Sympatry – Populations or species that live in the same  geographic area - close enough to mate Allopatry vs. Sympatry 7G
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DISPERSAL AND COLONIZATION CAN ISOLATE POPULATIONS. Island
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Oct16_Speciation2 -...

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