![]() ![]() As a result, organisms with traits (and therefore the mutations that result in those traits) that make them better suited to a particular environment are more likely to have offspring and pass on their genes. Some traits are more advantageous (or deleterious) in certain environments than others. (Key Concepts B, C, and G) Explain how the environment plays a role in changing the frequency of a mutant allele in a population. Students may also mention that the dark-colored volcanic rock played a role in making dark-colored fur (and the corresponding alleles or mutations) favored, but this is not necessary for a complete answer.ĥ. (Key Concepts A, B, and F) 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 selective pressure does not cause mutations but rather determines whether a mutation is advantageous or deleterious in a particular environment. (Key Concepts B and G) Is the following statement true or false? Justify your answer in one or two sentences: “The same mutation could be advantageous in some environments but deleterious in others.” True the environment or selective pressure determines whether a mutation is beneficial. (Mutations can be nonrandom, but they are not caused by selective pressure.) Students may also mention that environmental selective pressure acts on the phenotype that results from the mutations but does not cause the mutations or the phenotype to appear. (Key Concepts A, B, and F) Is the following statement true or false? Justify your answer in one or two sentences: “Mutations are caused by selective pressure in the environment.” False the mutations discussed in this film occurred at random. Students may also mention that the change is random, but this is not necessary for a complete answer. ![]() (Key Concept A) Define “mutation.” A mutation is a change in an organism’s DNA sequence. Were the genes involved the same as those in mice of the Valley of Fire? 19.Part of Modeling Natural Selection: ROCK POCKET MOUSE PRACTICE QUIZ QUESTIONS AND ANSWERS 1. Did natural selection produce the same result under the same conditions elsewhere? and 18. If they have a 10% survival advantage over lighter mice, the mutation would take about years to spread throughout the population. If individuals have a 1% survival advantage over lighter mice, then this mutation would take about _years to spread throughout the population. The black mice arose through a in a gene called with it have an on the dark lava rock.Ħ. ![]() What selective force drove this change in color (light to dark) over time? Individuals 15. ![]() Where are the lighter mice generally found? 14. Where are the dark mice generally found? 13. Rock pocket mice in this area come in two different colors: 12. The darker color of the ground in this region comes from years ago. The light color of the ground in this region comes from Amala A South 10. It highlights the research of Michael Nachman, who has quantified predation on rock pocket mice and identified adaptive changes in coat-color genes that allow the mice to travel under the radar of hungry predators.to learn about the people who contributed to this theory. This film uses the rock pocket mouse as a living example of Darwin's process of natural selection. Transcribed image text: Part II: Rock Pocket Mouse To complete part two, you'll watch Rock Pocket Mouse Video (opens in a new window) and answer the questions below. ![]()
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