DNA of the mitochondria has most commonly been used to construct evolutionary trees. New field of population genetics hopes to resolve important questions in migration theories that involve Aboriginies in Australia, North America, and...

Laurence Moran discusses one of the most important mechanisms of evolution, Random Genetic Drift.

This site discusses how genetic variability is correlated with the risk of organism extinction. It also discusses how bottlenecks can reduce genetic variability in populations leading to extinctions.

Icelandic biomedical company, deCODE, owns exclusive rights to a genetic database of all Icelanders. Studying the genome of the entire population could reveal trends because Iceland is such an isolated and hardly migratory nation. As...

This is a solid review of basic principles of population genetics with an emphasis on plants. Use this to complement your units on evolution and plant biology. Take the quiz to check your understanding.

How natural selection works at the level of genes, alleles, genotypes, & phenotypes.

This site from Palomar College describes the conditions needed for theHardy-Weinberg Principle to hold true.Completes sample calculations involvingthis principle.

Learn how to find allele frequency and how it's different from genotype frequency.