Speciation Flashcards
Speciation
The process of a new species being developed
types of speciation
Sympatric and Allopatric
Sympatric speciation
- in the same country
- organisms are reproductively isolated e.g., physical changes
- prevents gene flow
Allopatric speciation
- different country
- organisms are reproductively isolated by geographic location
- prevents gene flow
Allopatric speciation process
1) organisms are separated via geographic isolation
2) random mutations lead to variation and adaptation
3) natural selection allows better adapted organisms to survive and reproduced
4) gene flow between isolated populations stop
5) overtime’s populations change sufficiently so they can no longer breed to produce fertile offspring
Sympatric speciation process
1) random mutations lead to variation and adaptations
2) natural selection allows better adapted organisms to survive and reproduce
3) organisms become reproductively isolated e.g., breeding patterns
4) gene flow between isolated populations stop
5) overtime populations change sufficiently so they can no longer produce fertile offspring
Gene flow
Refers to the movement of genes or alleles between interbreeding populations of a particular species