Flour beetles, Tribolium castaneum, are easy to keep and widely used as laboratory animals. They consume wheat and other grains while being adapted to survive in very dry environments. The flour beetles are major pests in the agricultural industry, in particular cereal silos, and are highly resistant to insecticides. An experiment was conducted over 20 generations using different populations of flour beetles over 20 generations. Using breakfast cereal as a food source, two different populations of 10 (figure 1) and 100 (figure 2) were studied with each beetle being heterozygous for alleles b+ and b alleles. The frequency of the b+ allele was measured in the population after every generation. Figure 1. Population of 10 flour beetles over 20 generations Figure 2. Population of 100 flour beetles over 20 generations Describe the most likely the cause of the consistent data for figure 2 vs. figure 1. Explain what evolutionary factor was at play for the difference in data over the 20 generations.
Flour beetles, Tribolium castaneum, are easy to keep and widely used as laboratory animals. They consume wheat and other grains while being adapted to survive in very dry environments. The flour beetles are major pests in the agricultural industry, in particular cereal silos, and are highly resistant to insecticides. An experiment was conducted over 20 generations using different populations of flour beetles over 20 generations. Using breakfast cereal as a food source, two different populations of 10 (figure 1) and 100 (figure 2) were studied with each beetle being heterozygous for alleles b+ and b alleles. The frequency of the b+ allele was measured in the population after every generation. Figure 1. Population of 10 flour beetles over 20 generations Figure 2. Population of 100 flour beetles over 20 generations Describe the most likely the cause of the consistent data for figure 2 vs. figure 1. Explain what evolutionary factor was at play for the difference in data over the 20 generations.
Human Anatomy & Physiology (11th Edition)
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,...
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- Flour beetles, Tribolium castaneum, are easy to keep and widely used as laboratory animals. They consume wheat and other grains while being adapted to survive in very dry environments. The flour beetles are major pests in the agricultural industry, in particular cereal silos, and are highly resistant to insecticides.
An experiment was conducted over 20 generations using different populations of flour beetles over 20 generations. Using breakfast cereal as a food source, two different populations of 10 (figure 1) and 100 (figure 2) were studied with each beetle being heterozygous for alleles b+ and b alleles. The frequency of the b+ allele was measured in the population after every generation.
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Figure 1. Population of 10 flour beetles over 20 generations
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Figure 2. Population of 100 flour beetles over 20 generations
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- Describe the most likely the cause of the consistent data for figure 2 vs. figure 1. Explain what evolutionary factor was at play for the difference in data over the 20 generations.
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16
generations
generations
Figure 1. Population of 10 flour beetles over 20
generations
Figure 2. Population of 100 flour beetles over 20
generations
Frequency of b+ alele
Frequency of b+ alele
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