Population Genetics Lab

Population Genetics Lab : Please color code your responses
Link I: https://www.youtube.com/watch?v=xPkOAnK20kw
Link II: https://learn.genetics.utah.edu/content/evolution/pocketmice
Recap on Hardy Weinberg
p2+2pq+q2=1 p+q=1
p= the frequency of the dominant allele in the population
q= the frequency of the recessive allele in the population
P2= the homozygous dominant individuals
2pq= heterozygous individuals
q2= the homozygous recessive individuals

Population Genetics Lab

In your own words, describe/define the following:
1. Evolution:
2. Population:
3. Genotype:
4. Phenotype:
5. Allele:
6. Natural selection:

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Population Genetics Lab
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Population Genetics Lab



A. The frequency of individuals that display the recessive trait, dd. This is your q2 value:
B. The frequency of recessive alleles in the population, d. This is your q value:
C. The frequency of dominant alleles, D. This is your p value:
D. The percentage of individuals that are homozygous dominant (DD):
E. The percentage of mice in the population that are heterozygous, Dd. This is 2pq:
F. Suggest a reason for the number of d alleles in the population:

Population Genetics Lab

2. You have sampled a population in which you know that the percentage of the
homozygous recessive genotype (aa) is 41 %. Using that 41%, calculate the following:
A. The frequency of the “aa” genotype:
B. The frequency of the “a” allele:
C. The frequency of the “A” allele:
D. The frequencies of the genotypes “AA” and “Aa”:
3. In pea plants, flowers can be purple (P) or white (p). In a field of peas, you count 13
plants with white flowers and 202 plants with purple flowers.
A. What is the value of q?
B. What is the value of p?
C. What is the frequency of heterozygous plants in the field?
D. Check your work, p2+2pq+q2=1 Are your numbers correct?

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