Browse by Topic: Populations

bighorn sheep

Video, Educator Materials

Highways Block Bighorn Sheep

This Science Bulletin, Highways Block Bighorn Sheep, is based on the scientific research of Clinton Epps. He was interested in understanding if highways built to connect Los Angeles and Las Vegas might affect bighorn sheep populations.


Bighorn Sheep Map Roads Populations

Educator Materials

Meet the Bighorn Sheep

This slideshow provides background information on the bighorn sheep and their habitat and breeding habits.


Boundaries Mason Dixon

Educator Materials

Boundaries and Isolation

This discussion explores the difference between natural and human-made boundaries and their effect on isolated populations.


Group of bighorn sheep

Educator Materials

Isolation and Mate Choice

This discussion explores how artificial boundaries can decrease mate choice, with a specific example of highways limiting mate choice for bighorn sheep.


Colored Popsicle Sticks

Educator Materials

Using DNA to Detect Isolated Populations

Use popsicle sticks, M&Ms or other colored tokens to demonstrate how DNA can be used to determine whether populations are isolated from one another.




Charles II of Spain

Educator Materials

Inbreeding Case Studies Activity Part 2

This activity extends part 1 by reassigning students to new groups to present the case study completed in part 1, and then to complete the remaining case studies. 





Genetic Distance Values

Educator Materials

Extension: Genetic Distance Values

This optional extension for advanced students shows how Dr. Epps' genetic distance data and FST values are translated to the maps in the datasets.


Representing the Data on a Map main image

Educator Materials

Representing the Data on a Map

Students transfer their data, and their predictions of where the highways are, to a larger class size map.











final thoughts placeholder image

Educator Materials

Bringing the Stories Together

How mundane or ordinary aspects of daily life can lead to environmental issues by disrupting ecological function, in this case harming populations by disrupting habitats.