Throughout the activity, students learn concepts such as fitness, natural selection, mutation, and phenotype. Rock pocket mice with dark-coloured fur were more fit on dark-coloured volcanic rock because visual predators could not see them well. Students then watch the HHMI Video on pocket mice and answer discussion questions. Answer: Populations of rock-pocket mice included many individuals with light-coloured fur, and a few with dark-coloured fur. The factor that influences Natural selection in the Rock Pocket mouse case is the mice predator being the hawks. Students also graph the color differences at each location to show how the dark variation increased over time in response to an environmental change. In this activity, what physical trait most influences the rock pocket mouses overall fitness The trait of dark or light fur color influences the.
Michael Nachman studies the evolutionary processes that led. Why didn't this phenotype become more common in the population The dark-colored mice arose in the population at location A by random mutation. dark fur color evolved independently on each lava flow d. Why does a rock pocket mouse's color affect its fitness camouflage can play a role in helping it survive from its predators Explain the presence of dark-colored mice at location A. there are at least two genes involved in creating dark-colored mouse fur c. dark-colored fur evolved only once in rock pocket mice b. Mice living on light-colored sand tend to have light-colored coats, while mice living on patches of dark-colored rock have mostly dark-colored coats. (Note: More than one answer is correct.) a. Which word describes the form of a dark pigment in organisms melanic 5. Most mice have sandy, light-colored coat to match the environment where they live. Which of the following is TRUE Read carefully. Nonsense mutation: This mutation causes the protein to be truncated (cut short) due to the incorporation of a stop signal into the DNA sequence. Where do rock pocket mice live geographically Southwestern U.S. q0.4 If the frequency of p in a population is 60 (0.6), what is the frequency of q p2 0.04 In a population of 1,000 rock pocket mice, 360 have dark-colored fur. The rock pocket mouse, Chaetodipus intermedius, a small, nocturnal animal, is found in the deserts of the southwestern United States. (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. This film describes natural selection and adaptation in populations of rock pocket mice living in the American Southwest. Activity Student HandoutMolecular Genetics of the Color Mutations in Rock Pocket Mice sequence of amino acids), which can result in a change in the three-dimensional conformation of the protein. Students watch a short film and complete a worksheet and graphing exercise that reinforces the concepts of. 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. Students look at cards showing light and dark mice on different substrates. It has been simplified from the original activity so that it is suitable for beginner biology students. Explain how you decided which illustration represents the most recent rock pocket mouse population and why you positioned the others in the sequence as you did.This worksheet was modified from the HHMI Activity on color variation in the rock pocket mouse. Indicate your order by circling the appropriate number on your data sheet.
Place the illustrations in order from oldest to most recent. Record your counts in the spaces provided on your data sheet (page 1) 2. Mutations with even a small selective advantage can lead to rapid evolution of populations.
Count the number of light-colored and dark-colored mice at each location at each moment in time. Remember When creating a graph, the independent variable always. 1 Student Directions: Pocket Mouse AnalysisĢ Warm-up The illustrations represent snapshots of rock pocket mouse populations at two different locations, A and B, at a particular moment in time. Be sure to provide a graph title, labels for the x- and y-axes, and remember to include a key.
0 kommentar(er)
