Speciation
- Created by: Hannah Kent
- Created on: 27-01-14 11:54
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- Speciation
- Speciation is the development of a new species.
- It occurs when populations of the same species become reproductively isolated.
- This can be due to physical barrier, eg. a flood or an earthquake, divides the population of a species, causing some individuals to becomes separated from the main population. This is known as Geographical Isolation.
- Populations that are Geographically Isolated will experience slightly different conditions. Eg. A different climate
- The populations will experience different selective pressures and so different changes in allele frequency.
- Different alleles will be more more advantageous in the different populations.
- The changes in allele frequency will lead to differences accumulating in the gene pools of the separated populations, causing changes in the phenotype.
- Eventually, individuals from the different populations will have changed so much that they wont be able to breed with one another to produce fertlle offspring.
- They become reproductively isolated.
- Eventually, individuals from the different populations will have changed so much that they wont be able to breed with one another to produce fertlle offspring.
- The changes in allele frequency will lead to differences accumulating in the gene pools of the separated populations, causing changes in the phenotype.
- Allele frequencies will also change as mutations will occur independently in each population.
- The changes in allele frequency will lead to differences accumulating in the gene pools of the separated populations, causing changes in the phenotype.
- Eventually, individuals from the different populations will have changed so much that they wont be able to breed with one another to produce fertlle offspring.
- They become reproductively isolated.
- Eventually, individuals from the different populations will have changed so much that they wont be able to breed with one another to produce fertlle offspring.
- The changes in allele frequency will lead to differences accumulating in the gene pools of the separated populations, causing changes in the phenotype.
- Different alleles will be more more advantageous in the different populations.
- This can be due to physical barrier, eg. a flood or an earthquake, divides the population of a species, causing some individuals to becomes separated from the main population. This is known as Geographical Isolation.
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