Essential Idea: Gene pools change over time.
- Outline answer to each objective statement for topic 10.3 (coming soon)
- Quizlet study set for this topic (coming soon)
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.
- Define gene pool.
- Given data, calculate allele frequencies of genes in a gene pool.
- Given data, calculate genotype frequencies for genes in a gene pool.
10.3.U2 Evolution required that allele frequencies change with time in populations.
- Define evolution.
- Outline five factors that can cause evolutionary change.
10.3.U3 Reproductive isolation of populations can be temporal, behavioral or geographic.
- Compare allopatric and sympatric speciation.
- Define reproductive isolation.
- Explain temporal, behavioral and geographic isolation as mechanisms of speciation.
- Describe an example of temporal, behavioral and geographic reproductive isolation.
- Define speciation.
10.3.U4 Speciation due to divergence of isolated populations can be gradual.
- Outline a limitation of the idea of evolution through gradualism.
- Identify gradualism from graphs of morphology changes over time.
- Define gradualism.
10.3.U5 Speciation can occur abruptly.
- Define punctuated equilibrium.
- Outline a possible cause of rapid speciation events.
- Identify punctuated equilibrium from graphs of morphology changes over time.
10.3.A1 Identifying examples of directional, stabilizing and disruptive selection.
- Define stabilizing, disruptive and directional selection.
- Use graphs to illustrate or identify stabilizing, disruptive and directional selection.
10.3.A2 Speciation in the genus Allium by polyploidy.
- Outline how polyploidy has led to many species of Allium.
- List example species in the genus Allium (by common name)
10.3.S1 Comparison of allele frequencies of geographically isolated populations.
- Compare allele frequencies of two populations.
- Describe how variations in the allele frequencies of a gene may be evidence of speciation.
10.3.NOS Looking for patterns, trends and discrepancies- patterns of chromosome number in some genera can be explained by speciation due to polyploidy.
- Define polyploidy.
- Outline causes of polyploidy.
- Explain how polyploidy can lead to speciation.