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
Applications:
- Identifying examples of directional, stabilising and disruptive selection
- Speciation in the genus Allium by polyploidy
Skills:
- Comparison of allele frequencies of geographically isolated populations