Example

=Worked out Example:=

To help you see how this works, I have included an example of a simple key and a video showing how it works.

For this sample dichotomous key, we are going to look at five pieces of fruit; an apple, an orange, a strawberry, a couple of bananas, and a bunch of grapes.



Watch the videos below to see how a dichotomous key can be created for these 5 objects. Please note that there are other perfectly valid keys that can be made from these same 5 objects. If you think of one, click on the discussion tab above and share it!

media type="custom" key="5735847"

Video 1 - how to make the first division
media type="custom" key="5735915"

Video 2 - how to make the rest of the key
media type="custom" key="5735925"

Video 3 - why the key works; an alternate version
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Sample key from the video:
1. Have an edible (able to be eaten) skin .......................... go to step 2 (the apple, strawberry, and grapes) ... Does not have an edible skin ....................................... go to step 3 (the orange and the banana)

2. Grows in bunches ...................................................... grapes (only fruit that has an edible skin and grows in bunches) ... Does not grow in bunches ........................................... go to step 4 (apples and strawberries have an edible skin but do not grow in bunches)

3. Has a round shape ..................................................... orange (only fruit without an edible skin that has a round shape) ... Does not have a round shape ....................................... banana (only fruit without an edible skin that does not have a round shape)

4. Has seeds on the outside ........................................... strawberry (only fruit has seeds on the outside, that does not grow on a tree, and that has an edible skin) ... Does not have seeds on the outside ............................. apple (only fruit that does not have seeds on the outside, that does not grow on a tree, and that has an edible ...................................................................................... skin) top

media type="custom" key="5757985" click here to see the answers

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