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):​​​​​​​​​​​​​​

• Natural Selection 
• Speciation 

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.