The Origin of Species

• Biological Species Concept?


  Defines what a species is and that they can breed together and is held together by gene flow
• Speciation of the splitting of a species into two or more species
• Prezygotic Barriers:

  Habitat isolation

  Temporal isolation

  Behavioral isolation

  Mechanical isolation

  Gametic isolation
• (river between species)?

  Habitat isolation
• One is diurnal while the other is nocturnal?

  temporal isolation
• Calling between species is different or mating rituals are different?

  Behavioral Isolation
• Sex doesn't work morphologically?

  Mechanical Isolation
• Sperm isn't able to fertilize eggs

  gametic isolation
• Allopatric speciation is due to geographical divide and gene flow divide
• Polyploidy is extra sets of chromosomes, usually in plants
• An autopolyploid is an individual with more than two chromosome sets from one species
• An allopolyploid is a species from multiple species that can't interbreed