Question

On a separate sheet of paper, plug in the following values for p and q into...

On a separate sheet of paper, plug in the following values for p and q into the Hardy-Weinberg equation (p2+2pq+q2=1):

p=0.5, q=0.5

p=0.6, q=0.4

p=0.7, q=0.3

p=0.8, q=0.2

p=0.9, q=0.2

p=1.0, q=0.0

You have just modeled genetic drift acting on a population. After you have plugged these values in, what trend do you see with regards to the frequencies of the homozygous q (q2) and heterozygous (2pq) genotypes? What does this tell you about genetic drift?

Homework Answers

Answer #1
P2 2PQ Q2
1 25% 50% 25%
2 36% 48% 16%
3 49% 42% 9%
4 64% 32% 4%
5 81% 36% 4%
6 100% 0% 0%

As we can see that value of pq and q2 are decreasing... This signifies the gene frequency is changing due to genetic drift. There are only homozygous p individuals left and entire population having q allele has either migrated or due to change in environmental condition or any natural calamity has led to complete eradication of population having q allele.

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