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Speciation
How does one species become two?
In order for speciation to happen there has to be some type of reproductive isolation
-The definition of a species is a group or populations whose members have the potential to interbreed in nature and produce viable, fertile offspring- but do not produce viable, fertile offspring with members of other such groups
-Because the definition has to do with mating a population needs to be kept reproductively isolated from another until they have changed so much that they can no longer breed
-There are two types of reproductive isolation
-Prezygotic barriers - Before sex
-Postzygotic barriers- after sex
Now lets label them
Allopatric and sympatric speciation
Allopatric speciation is when one species becomes two while being geographically isolated
Sympatric speciation is when one species becomes two while still living in the same geographical region
Sometimes Hybrid zones are created
A hybrid zone can go through 0ne of three phases
-Reinforcement
-Fusion
-Stability
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