The Formation of New Species. Isolation of Subpops Mechanisms of evolution cause isolated subpops...
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Transcript of The Formation of New Species. Isolation of Subpops Mechanisms of evolution cause isolated subpops...
The Formation of New Species
Isolation of Subpops Mechanisms
of evolution cause isolated subpops to diverge
Allopatric Speciation Geographic isolation prevents interbreeding
Adaptive Radiation A series of allopatric speciation events
Sympatric Speciation Reproductive isolation prevents interbreeding
May be pre- or postzygotic
Allopatric Sympatric
Prezygotic Isolation Habitat
Prezygotic Isolation Behavioral
Mating Season for
Group A
Mating Season for
Group B
Prezygotic Isolation Temporal
J F M A M J J A S O N D
Prezygotic Isolation Mechanical
Prezygotic Isolation Gametic
Postzygotic Isolation
Speciation Review1. Studying : good grades ::
_______:speciation
2. Contrast microevolution and macroevolution.
3. What type of isolation must exist in a case of allopatric speciation?
4. How does a temporal barrier lead to speciation, and what type of speciation would this be?
Patterns of Evolution Divergent
Variation in Morphology
TIME
Patterns of Evolution Convergent
Variation in Morphology
TIME
Patterns of Evolution
Patterns of Evolution
Patterns of Evolution Coevolution
Variation in Morphology
TIME
Patterns of Evolution Coevolution