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Essential Idea: Gene pools change over time
Essential Idea: Gene pools change over time
Understandings:
- A gene pool consists of all the genes and their different alleles, present in an interbreeding population.
- Evolution requires that allele frequencies change with time in populations.
- Reproductive isolation of populations can be temporal, behavioural or geographic.
- Speciation due to divergence of isolated populations can be gradual.
- Speciation can occur abruptly.
Application:
- Identifying examples of directional, stabilizing and disruptive selection.
- Speciation in the genus Allium by polyploidy.
Skills:
- Comparison of allele frequencies of geographically isolated populations.
Nature of science:
Looking for patterns, trends and discrepancies - patterns of chromosome number in some genera can be explained by speciation due to polyploidy. (3.1)
Introductory video:
Introductory video:
Powerpoint
Powerpoint
10.3 Gene Pool and Speciation HL.pptxGoogle Sites
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