SPECIATION BY NATURAL SELECTION ACTIVITY

Directions: Complete the activity and then answer the following questions on a separate piece of paper or in a GoogleDocs and print out. Click on the link to access the activity:
Speciation
1. How does natural selection change the a population at the level of its genes?

It changes the frequencies of alleles that encode traits. This process is called microevolution. 2. In the moth example, which genotype was the cryptic version?

The genotype was AA and Aa.
3. Which genotype was the non­cryptic version?

aa was the genotype for non cryptic version.
4. What was it about the non­cryptic version that allowed you to eat more of them?

They were more visible on the screen and not as well camouflaged.
C
lick on the
Help
box on screen 4 and read through the screens to learn how to calculate allele frequencies which is necessary to complete #5­13.
5. If there are two AA moths, how many A alleles do they have total?

There will be 4 A alleles.
6. If there are 16 Aa moths, how many A alleles do they have total?

There will be 16 A alleles.
7. If there are 32 aa moths, how many A alleles do they have total?

There will be 0 A alleles.
8. Allele frequencies are always ______less________ than or ________equal_____ to one.
9. At the start of generation 1 what is the allele frequency for A?

At the start of generation 1, the allele frequency for A is .3 10. At the start of generation 1 what is the allele frequency of a?

At the start of generation 1, the allele frequency for a is .7 11. What is the allele frequency for a for the survivors of generation 1?

The allele frequency for a for the survivors of generation 1 is 0.7. 12. What is the allele frequency for A for the survivors of generation 2?

The allele frequency for A for the survivors of generation 2