**Natural Selection: Worksheet**Imagine your anthropology professor studies a primate that eats insects. The primate’s favorite food is a type of ant. She asks if you are interested in helping her analyze the data. You, of course, say yes!Your professor tells you more about the ants, the primates, and the habitat. Ant color is determined by one gene. There are two alleles for this color gene: the brown allele and the green allele. The primates eat the ants year-round, but your professor knows that the way they eat the ants differs between the rainy season and the dry season. During the rainy season, when there are green leaves on the trees, the primates eat the ants off the green leaves. During the dry season, when the trees lose their leaves, the primates eat the ants off the brown tree branches.Your professor has collected data to investigate if the primate acts as a selective pressure on the ant population, possibly changing the allele frequencies over time.### Step One: HypothesisYou need to start with a hypothesis. The following questions will help you to frame your hypothesis.1. How do the ants vary?2. What is the selective pressure?3. What is the dependent variable?4. What is the independent variable?5. Now, write a hypothesis for the following question: During the rainy season, which allele frequency (brown or green) will increase over time?---**Explorations Lab and Activities Manual** | **[CC BY-NC](https://creativecommons.org/licenses/by-nc/4.0/)** | **[http://explorations.americananthro.org/](http://explorations.americananthro.org/)** ## Step Two: The Rainy Season DataYour professor is happy with the hypothesis that you have written. She gives you the data that she collected on the ant population. Because of the fast rate of reproduction among ants, she was able to collect a number of ants of each color over four generations. The data are in the table below.### Table 1: Number of Ants Collected During the Rainy Season| Generation of Ants | Brown Ants | Green Ants | Total Ants ||--------------------|------------|------------|------------|| Generation 1 | 100 | 100 | 200 || Generation 2 | 90 | 120 | 210 || Generation 3 | 75 | 150 | 225 || Generation 4 | 65 | 170 | 235 |### InstructionsCalculate 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.#### To Calculate Allele Frequencies Within Each Generation:1. **Calculate the number of brown alleles by multiplying the number of brown ants (from Table 1) by 2. Calculate the number of green alleles by multiplying the number of green ants (from Table 1) by 2. Write in Table 2.**2. **Calculate the total number of alleles by adding the number of brown alleles and the number of green alleles. Write in Table 2.**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 2.**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 2.**5. **Check your math by calculating the total allele frequency. Write in Table 2.***Explorations Lab and Activities Manual . CC BY-NC . [http://explorations.americananthro.org/](http://explorations.americananthro.org/)*

A hypothesis is an explanation or prediction that has been proposed and can be tested through…

Natural Selection: Worksheet Imagine your anthropology professor studies a primate that eats insects. The primate's favorite food is a type of ant. She asks if you are interested in helping her analyze the data. You, of course, say yes! Your professor tells you more about the ants, the primates, and the habitat. Ant color is determined by one gene. There are two alleles for this color gene: the brown allele and the green allele. The primates eat the ants year-round, but your professor knows that the way they eat the ants differs between the rainy season and the dry season. During the rainy season, when there are green leaves on the trees, the primates eat the ants off the green leaves. During the dry season, when the trees lose their leaves, the primates eat the ants off the brown tree branches. Your professor has collected data to investigate if the primate acts as a selective pressure on the ant population, possibly changing the allele frequencies over time. Step One: Hypothesis You need to start with a hypothesis. The following questions will help you to frame your hypothesis. 1. How do the ants vary? 2. What is the selective pressure? 3. What is the dependent variable? 4. What is the independent variable? 5. Now, write a hypothesis for the following question: During the rainy season, which allele frequency (brown or green) will increase over time?

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...