![]() Graph A shows the decline of light mice that is opposite to the increasing population of black mice. You monitor the populations for five years and observe the following:Ī) In one or two sentences, summarize the data presented in the graphs above. You also move 160 dark-colored mice from the New Mexico colony to the Arizona colony (Graph B). You next decide to move 160 of these newly discovered light-colored rock pocket mice from Arizona to a colony in New Mexico (Graph A) that also lives on dark-colored volcanic rock. Black mice do not have as much as a higher survival advantage over light mice because of this.ĥ. Natural selection is not able to work to the same extent because black mice advantage over predators in the dark volcanic rock is not as useful due to the lack of predators. Be sure to include the following key words in your answer: selection (or selective), fitness (or fit), survival (or survive). You observed the following numbers of light- and dark-colored mice on this new patch of rock:Ī) In one or two sentences, summarize the data presented in the graph.ī) Provide one possible hypothesis that would explain the observed data. This environment does not have nearly as many visual predators as in previously studied areas in New Mexico. ![]() These mice live on a recently discovered patch of dark-colored volcanic rock. You are studying a new population of rock pocket mice in Arizona. (c) The same mutation spontaneously arose in the two different populations.Ĥ. Which of the following could explain this observation? The sequence you get is identical to that of the same gene in another rock pocket mouse population with dark-colored fur that live on a different patch of volcanic rock. You take a DNA sample from a member of this new population and determine the DNA sequence of a gene known to play a role in fur color. You are studying a recently discovered population of rock pocket mice with dark-colored fur that lives on volcanic rock. Natural selection is not random because it rewards the species that are most attuned to the surrounding environment by giving them a higher rate of survivability.ģ. Mutations occur every generation and the occurrence of a mutation has nothing to do with the environment (excluding radioactive environments). Sean Carroll states that, “While mutation is random, natural selection is not.” In your own words, explain how this is possible. The mutation for the black fur on the rock pocket mouse was a random occurrence however the black volcanic rock is responsible for giving black mice an advantage over regular mice.Ģ. Is the following statement true or false? Justify your answer in one or two sentences: “The appearance of dark- colored volcanic rock caused the mutation for black fur to appear in the rock pocket mouse population.” False. Sickle-cell Disease Hypothesis As your hypothesis, either propose a hypothesis that addresses natural selection in tropical Africa specifically or state the Hardy-Weinberg equilibrium.1. Would you expect your results to be the same if you had chosen different starting allelic frequencies? Explain. If you can, formulate a general summary statement or conclusion (2 points) Type your 11. Compare your final allelic and genotypic frequencies with those of the starting population. Describe the changes in genotypic frequencies. Did the results match your predictions? Explain. Describe the changes in allelie frequencies and yover time (see graphs above). How many generations did you simulate? (2 points) 7. Briefly describe the scenario that was simulated? (2 points) Dope you were 4. Which condition was changed? (2 points) Typyr 3. Which of the conditions that are necessary for Hardy Weinberg equilibrium were met in this simulation points 2. Which of the conditions that are necessary for Hardy Weinberg equilibrium were met in this simulation? (2 points) 2. Natural Selection - Rock Pocket Mice 0.00 Allelic frequency 0.60 0.00 Generation Discussion 1. Changes in allelic frequencies of the dominant (1) and recessive (a) traits over time for the rock pocket mice natural selection simulation. Changes in allelic and genotypic frequencies for the rock pocket mice natural selection simulation. (2 points) Type your where Refer to Table 11.5 and the accompanying graph for data reflecting changes in allelic and genotypic frequencies for the rock pocket mice simulation Table 11.5. (2 points) Type your Predictions Either predict equilibrium values as a result of Hardy-Weinberg or predict the type of change that you expect to observe as a result of natural selection in the polluted environment (ifthen). Rock pocket mice - adaptive melanism Hypothesis As your hypothesis, either propose a hypothesis that addresses natural selection occurring in either dark or light rock environments specifically or state the Hardy-Weinberg equilibrium.
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