Experiment 4: Natural
Selection

Data and Post-Lab Assessment

Procedure Steps 7 and 8

7. Record
the remaining colors.

Blue _____________ Red
_____________

Do you observe
a selective advantage for the red or blue beads? Why?

8.
Repeat
the process using the Blue Habitat with the remaining beads.

What beads remain now?

Blue
_____________ Red _____________

Post-Lab Questions

1. How did the distribution of
phenotypes change over time?

2.
Is
there a selective advantage or disadvantage for the red and/or blue
phenotypes?

3.
What
phenotypic results would you predict if starting with the following population
sizes?

A.1000:

B.100:

C.10:

4. Assume that you live in a country
with 85 million people that consistently experience an annual growth rate of
4.%. If this population continues to grow at the same rate for the next 5
years, how many people will live in the country (round to the nearest whole
number).