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© 2012 Charles Burrows. All Rights Reserved.

(Each person in a group can focus on one body part!)

**SUMMARY:**

Students roll dice to determine the characteristics of one chuckabee.

Class calculates the population's characteristics' averages.

Each group rolls a die to become geographically separated.

Students roll a die three times to see:

**1st**: Which characteristic "feels" selective pressure (yep... One characteristic at a time)

**2nd**: How this pressure affects the characteristic (simple math for speed)

**3rd**: How long the pressure affects the characteristic for (potential amplification of characteristics)

Repeat for 10,000 years. See: **Sample Data**

Students compare the ending population characteristics to the starting characteristics, and to other groups' ending characteristics by DRAWING them with cm rulers!

I included the end results of my first time doing it. See: **Sample Chuckabees**

**Top:** An Individual Chuckabee

**Middle:** Beginning AverageCharacteristics of Starting Population

**Bottom:** Ending Average Characteristics of Geographically Isolated Population (Notice the missing tongue? The last number ended up being zero!)