Topic 10.3: Gene pools change over time.
Essential Idea: Meiosis leads to independent assortment of chromosomes and unique composition of alleles in daughter cells.
At SHS, Topic 10.3 is taught in the following class unit(s):
Statements & Objectives:
10.3.U1 A gene pool consists of all the genes, and their different alleles, present in an interbreeding population.
10.3.U2 Evolution required that allele frequencies change with time in populations.
10.3.U3 Reproductive isolation of populations can be temporal, behavioral or geographic.
10.3.U4 Speciation due to divergence of isolated populations can be gradual.
10.3.U5 Speciation can occur abruptly.
10.3.A1 Identifying examples of directional, stabilizing and disruptive selection.
10.3.A2 Speciation in the genus Allium by polyploidy.
10.3.S1 Comparison of allele frequencies of geographically isolated populations.
10.3.NOS Looking for patterns, trends and discrepancies- patterns of chromosome number in some genera can be explained by speciation due to polyploidy.
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