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The beach mouse (Peromyscus polionotus) is a small rodent found in the southeastern United States. Coat color in the beach mouse is variable, from dark brown to blonde (Figure 1). A pigment called eumelanin is responsible for some of the diversity in mouse coat color. The MC1R gene, located on chromosome 8, plays a major role in the synthesis of eumelanin. There are two alleles of MC1R: R allele. Results in a functional MC1R protein that leads to stimulation of pigment production. This allele is found in dark colored mice. C allele. Results in a non-functional MC1R protein. Pigment production is, as a result, not stimulated. This allele is found in light colored mice.   Figure 1. Beach mouse with light fur (left) and dark (right). These mice are hunted by visual predators like owls and fox. The distribution of coat color is not random. Beach mice with dark fur are found further inland, on dark brown soils while mice with light fur are found on beaches, where the sand is light brown. Dark fur mice also have to compete with another mouse species (Peromyscus maniculatus) that inhabits a similar ecological niche. Question:

The beach mouse (Peromyscus polionotus) is a small rodent found in the southeastern United States. Coat color in the beach mouse is variable, from dark brown to blonde (Figure 1). A pigment called eumelanin is responsible for some of the diversity in mouse coat color. The MC1R gene, located on chromosome 8, plays a major role in the synthesis of eumelanin. There are two alleles of MC1R: R allele. Results in a functional MC1R protein that leads to stimulation of pigment production. This allele is found in dark colored mice. C allele. Results in a non-functional MC1R protein. Pigment production is, as a result, not stimulated. This allele is found in light colored mice.   Figure 1. Beach mouse with light fur (left) and dark (right). These mice are hunted by visual predators like owls and fox. The distribution of coat color is not random. Beach mice with dark fur are found further inland, on dark brown soils while mice with light fur are found on beaches, where the sand is light brown. Dark fur mice also have to compete with another mouse species (Peromyscus maniculatus) that inhabits a similar ecological niche. Question:

Human Anatomy & Physiology (11th Edition)
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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The beach mouse (Peromyscus polionotus) is a small rodent found in the southeastern United

States. Coat color in the beach mouse is variable, from dark brown to blonde (Figure 1). A pigment called eumelanin is responsible for some of the diversity in mouse coat color. The

MC1R gene, located on chromosome 8, plays a major role in the synthesis of eumelanin. There are two alleles of MC1R:

  • R allele. Results in a functional MC1R protein that leads to stimulation of pigment production. This allele is found in dark colored mice.
  • C allele. Results in a non-functional MC1R protein. Pigment production is, as a result, not stimulated. This allele is found in light colored mice.

 

Figure 1. Beach mouse with light fur (left) and dark (right).

These mice are hunted by visual predators like owls and fox. The distribution of coat color is not random. Beach mice with dark fur are found further inland, on dark brown soils while mice with light fur are found on beaches, where the sand is light brown. Dark fur mice also have to compete with another mouse species (Peromyscus maniculatus) that inhabits a similar ecological niche.

Question: 

Standard 5b Researchers studying beach mice in Florida observed a population and were able to determine the number of individuals of each genotype (Table 1). Table 1. Observed numbers of beach mice with light and dark fur Phenotype Genotype Number of Individuals Light Dark CC RC RR 572 24 104 Genotype Frequency 5. Using the data in Table 1, complete the table by calculating the observed genotype frequencies for this population. Show your work and enter the frequencies in Table 1, above.
Transcribed Image Text:Standard 5b Researchers studying beach mice in Florida observed a population and were able to determine the number of individuals of each genotype (Table 1). Table 1. Observed numbers of beach mice with light and dark fur Phenotype Genotype Number of Individuals Light Dark CC RC RR 572 24 104 Genotype Frequency 5. Using the data in Table 1, complete the table by calculating the observed genotype frequencies for this population. Show your work and enter the frequencies in Table 1, above.
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