Part B

First (F1) Generation

4. Model the breeding of offspring. Each origami bird lays a clutch of three eggs. Assume that the first chick is a clone of the parent. Fill in the table with data for this chick.

5. Assume that the next two chicks have mutations. Follow steps A-C below to determine the effects of each mutation.

Step A Flip a coin to determine which part of the bird is affected by the mutation. Heads = anterior (front) Tails = posterior (back) Step B Throw a die to determine how the mutation affects the wing.

(1) = The wing position moves 1 cm toward the end of the straw.

I (2) = The wing position moves 1 cm toward the middle of the straw.

JI , * (3) = The circumference of the wing increases 2 cm. I* * (4) = The circumference of the wing decreases by 2 cm. 1 % * (5) = The width of the wing increases by |p * 1 cm.

Step C A mutation is lethal if it results in a wing falling off or a wing with a circumference smaller than that of the straw. If you get a lethal mutation, disregard it, and breed another chick. Record the mutations and the dimensions of each offspring in your data table. The circumference of the wings can be calculated by measuring the length of the strips of paper used to form the wings and subtracting 1 cm for the overlap.

6. Test the birds. Release each bird with a gentle overhand pitch. It is important to release the birds as uniformly as possible. Test each bird at least twice.

7. The most successful bird is the one that flies the farthest. Record the flight distance of each offspring bird in your data table.

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