Throughout the activity, students learn concepts such as fitness, natural selection, mutation, and phenotype. Calculate the frequency of light colored mice and dark colored mice found on dark substrates. (It is sometimes grouped in the genus Perognathus. Frequency number of mice of one color / total number of mice on that substrate Frequency of light colored mice Frequence of dark colored mice 2. A typical rock pocket mouse is about 170 millimeters long from its nose to the end of its tail, shorter than an average pencil. In the desert, however, there are some patches of darker rocks. The rock pocket mouse (Chaetodipus intermedius) is one of 19 species of pocket mice in the genus Chaetodipus. Students then watch the HHMI Video on pocket mice and answer discussion questions. Rock pocket mice live in the lighter colored desert habitats of the United States and Mexico. Students also graph the color differences at each location to show how the dark variation increased over time in response to an environmental change. (Cards can be printed and laminated for multiple uses.) Students collect data on the number of mice phenotypes in each location and develop a hypothesis about the order of the cards. 5 2.If the frequency ofpin a population is 60 (0.6), what is the frequency ofq. Throughout the activity, students learn concepts such as fitness, natural selection, mutation, and phenotype. These mice li ve on a recently discovered patch of dark-colored volcanic rock. PART 1 QUESTIONS 1.If there are 12 rock pocket mice with dark-colored fur and 4 with light-colored fur in a population, what is the value of q Remember that light-colored fur is recessive.5. This activity provides an introduction to natural selection and the role of genetic variation by asking students to analyze illustrations of rock pocket. Students then watch the HHMI Video on pocket mice and answer discussion questions. Students look at cards showing light and dark mice on different substrates. Suppose you are studying a new population of rock pocket mice in Arizona. It has been simplified from the original activity so that it is suitable for beginner biology students. This worksheet was modified from the HHMI Activity on color variation in the rock pocket mouse.
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