1. In this environment, which allele frequency (brown or green) do you hypothesize will increase over time? Table 3: Number of ants collected during the dry season Generation of ants Generation 1 Generation 2 Generation 3 Generation 4 Brown ants 65 90 125 150 Green ants 170 150 120 100 Total ants 235 240 245 250 Calculate the frequency of the brown allele and of the green allele in each of the generations. We assume that each ant is a homozygote. Round to the nearest thousandths.

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Step Three: The Dry Season Data
During the dry season, the trees lose their leaves. The primates now eat the ants off of the
brown tree branches.
1. In this environment, which allele frequency (brown or green) do you hypothesize will
increase over time?
Table 3: Number of ants collected during the dry season
Generation of ants Brown ants
Generation 1
Generation 2
Generation 3
Generation 4
65
90
125
150
Green ants
170
150
Explorations Lab and Activities Manual
120
100
Total ants
235
240
CC BY-NC
245
Calculate the frequency of the brown allele and of the green allele in each of the generations.
We assume that each ant is a homozygote. Round to the nearest thousandths.
250
To calculate allele frequencies: Within each generation,
1. Calculate the number of brown alleles by multiplying the number of brown ants (from
Table 3) by 2. Calculate the number of green alleles by multiplying the number of green
ants (from Table 3) by 2. Write in Table 4.
2. Calculate the total number of alleles by adding the number of brown alleles and the
number of green alleles. Write in Table 4.
3. Calculate the brown allele frequency by dividing the number of brown alleles by the total
number of alleles. Round to the nearest thousandths. Write in Table 4.
4. Calculate the green allele frequency by dividing the number of green alleles by the total
number of alleles. Round to the nearest thousandths. Write in Table 4.
5. Check your math by calculating the total allele frequency. Write in Table 4.
http://explorations.americananthro.org/
Transcribed Image Text:Step Three: The Dry Season Data During the dry season, the trees lose their leaves. The primates now eat the ants off of the brown tree branches. 1. In this environment, which allele frequency (brown or green) do you hypothesize will increase over time? Table 3: Number of ants collected during the dry season Generation of ants Brown ants Generation 1 Generation 2 Generation 3 Generation 4 65 90 125 150 Green ants 170 150 Explorations Lab and Activities Manual 120 100 Total ants 235 240 CC BY-NC 245 Calculate the frequency of the brown allele and of the green allele in each of the generations. We assume that each ant is a homozygote. Round to the nearest thousandths. 250 To calculate allele frequencies: Within each generation, 1. Calculate the number of brown alleles by multiplying the number of brown ants (from Table 3) by 2. Calculate the number of green alleles by multiplying the number of green ants (from Table 3) by 2. Write in Table 4. 2. Calculate the total number of alleles by adding the number of brown alleles and the number of green alleles. Write in Table 4. 3. Calculate the brown allele frequency by dividing the number of brown alleles by the total number of alleles. Round to the nearest thousandths. Write in Table 4. 4. Calculate the green allele frequency by dividing the number of green alleles by the total number of alleles. Round to the nearest thousandths. Write in Table 4. 5. Check your math by calculating the total allele frequency. Write in Table 4. http://explorations.americananthro.org/
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