Genetic diversity is only possible with a healthy gene pool in a population. This resource explains the characteristics of a gene pool, why it is important, and factors that cause it to change. The examples provided demonstrate the...

Explain how the isolated and homegeneous population of Iceland makes research in family ancestry simpler than in other cultures. Investigate the work of genealogists, and trace your own heritage as far as you can without extensive research.

Explains what meiosis is and what happens during crossing over where genetic material is exchanged between chromosomes. This process is important for ensuring that there is lots of genetic variation in a population as it improves survival.

This site from Palomar college explains what gene flow is and describes a situation where this occurs in humans. Information is brief but factual.

This resource provides directions for a lab in which students observe changes in a gene pool of bunnies affected by natural selection. Includes PDF resources.

Students discover that variation in plants allows some varieties to survive in near-drought conditions. Next, students learn that different types of rabbits prefer to eat different varieties of plants. Students make the connection...

Discusses how unique species evolve when geographic barriers restrict population interbreeding, such as when organisms are confined to an island. Examples are provided.

A slideshow tracing human migration to show that "all living humans originated from populations of ancestors who migrated out of Africa less than 100,000 years ago. Learn how scientists have used genetic markers to trace the migration...