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Teacher Resources

Fruit Loop Evolution Selection Lab

Author: Susan Hemans


You will be drawing three different types of selection - stabilizing, directional and disruptive. This is a good lab after a lecture or reading in text about Natural Selection.



Subjects:  Science
Grade Level:  9101112


Christine Harty says:
11-Apr-14 05:11 PM

I really love the idea of this lab, but is there a way to also get the scenario cards?

Kathy says:
28-May-12 09:43 AM

I used some new fruitloop scenarios that worked for evolution and also for learning about disease and immunity. "An epidemic has hit the fruitloop ecosystem. It seems that the loops that the gene that gives them have blue, also controls a protein that makes them not susceptible to the virus."

michelle james james says:
17-Mar-11 05:11 PM

very good resources

Kathy says:
13-Mar-11 02:47 PM

If green is "selected against" then in this all-or-nothing scenario, all the green are taken out. This does not necessarily work like real life, but hey, these are fruit loops.

Melanie Buell says:
24-Nov-10 07:30 AM

I like the idea of this lab but it seems like more information is needed. Once the students read the scenario on the index card how do they know how many loops are eaten in order to graph the change. If the original population contained 10 red, 27 green, and 10 violet and the scenario says do to global warming green plants are now red and violet. How do students know how many green are lost?

Kathy Kahn says:
10-Apr-10 10:41 PM

Here are the promps...you can make some up too. Some of these, the students have to interpret. Here are some scenarios. You can make up lots of different ones, but try to keep a variety (directional, stabilizing, disruptive) Cut these into strips or cards to hand to a group. Your environment includes a loop-eater species that is colorblind to any color that does not contain red. A new species of loop-eater has been introduced to your environment. It only eats loops that are yellow or contain yellow in them. The favorite food of the local loop-eater is blue. When that is gone, it will eat red, but never touches the orange or yellow, and green is poisonous to this organism. This environment has a large group of blue-gobbling loop-eaters. They eat blue and any loops with blue in them. Oops, an alien species of loop-eater has entered your environment. It eats yellow and any intermediate color containing yellow. The loop-eater in your area is called the Patriot Parrot. It only eats red, white and blue loops.

Kathy Kahn says:
10-Apr-10 10:29 PM

I can give you examples of the cards because I wrote the lab up about ten years ago. All teachers share activities and this is a wonderful way to help the students get the best labs. This type of sharing is an accepted practice, but submitting with putting your name on something that is almost word for word taken from someone else's work is irritating and unprofessional. I think when you "adapt" a lab from another teacher's site, it should be noted as such. What do you think?

Edna Mendoza says:
30-Mar-10 04:04 PM

Can I have a sample of student's finished work from this activity?thnak you very much.

Edna Mendoza says:
30-Mar-10 04:02 PM

Can sample of finished work from this activity?thank you very much

Dan Herscher says:
24-Mar-10 09:55 PM

I would like to know some examples you use also.

Tamara Tisler says:
16-Feb-10 01:59 PM

I like the idea behind this lab. Is there anyway that I can have examples or copies of the index cards you hand out to your students?

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