Genetic Drift and Selection - Grade 11

Through this fully resourced lesson students will analyse how natural selection causes allele frequencies to be altered over time. Students will first recall the Hardy-Weinberg principle and the conditions it requires, they will then explain what is meant by genetic drift, the founder effect and the bottleneck effect. Students will finally determine the different ways natural selection alters phenotypes through exploring stabilising, directional, disruptive and sexual selection. Throughout the lesson students will also have the opportunity to apply their knowledge and understanding to exam style questions.

This is quite a long lesson with a many new key terms being introduced which may require 2 lessons to cover depending upon the pace and ability of the class.