Students analyze data from images of rock pocket mouse populations in different settings and over time. 2. To view this video please enable JavaScript, and consider upgrading to a web browser that

They then order those images based on the data and their knowledge of evolution by natural selection. A white belly, if visible, would be a disadvantage on a dark lava flow. 0 In this case, two mutations in two different genes caused the same phenotype: dark-colored fur. There is dark lava rock in the area where they live. The activity begins with students reading a magazine article and watching the film. Question 1 .

Dark-colored rock pocket mice have a reproductive advantage, so they would have more offspring than light-colored mice. If you need to review any part of the video before answering the question, you can scroll up and click on the timeline. Individuals change color to blend in with the environment. However, without selection, the dark-belly trait has not become common. %PDF-1.6 %���� Whether a mutation is favored, neutral, or detrimental depends on the conditions the organism lives in.

If you need to review any part of the video before answering the question, you can scroll up and click on the timeline. Individual rock pocket mice cannot change their fur color to camouflage themselves. 4. Originally, location B had a sandy-colored soil. 423 0 obj <>/Filter/FlateDecode/ID[<29341E0EC330994DACDBD224BC2ED376><929E581E07BFB14AB250811A9453D456>]/Index[381 106]/Info 380 0 R/Length 174/Prev 335043/Root 382 0 R/Size 487/Type/XRef/W[1 3 1]>>stream What technique is being used to find the mutations in the pocket mouse?

Chaetodipus intermedius. If you need to review any part of the video before answering the question, you can scroll up and click on the timeline. Which of the following statements is true? • Before watching the film, be sure that students write down initial thoughts about the order of the illustrations. ... Open modal to review and print your answers in … However, the dark-colored phenotype became morecommon once there was a selective advantage for it, which indicates that selection is not random.Write a scientific summary that describes changes in the rock pocket mouse populations at location B. Your summary shouldOriginally, location B had a sandy-colored soil.

You can find populations of rock pocket mice all over the Sonoran Desert in the southwestern United States. Why did dark-colored rock pocket mice first appear in a population of light-colored rock pocket mice? %%EOF 6 Questions Show answers. an idea of how much a rock pocket mouse weighs. Gel electropherisis . And why didn't it become more common?Occurred due to a random mutation and was not favoured because the mouse would not survive in the environment due to it's dark coat in light environmentUse the data and what you have learned about evolution to explain how mutation is a random process, but natural selectionThe mutation which results in a dark colour coat was present in the population before any volcanic activity could result in a dark soil, indicating that the mutation is random. 30 seconds . Predators eat light-colored rock pocket mice. What are the two different environments shown in the video? Whether a mutation is favored, neutral, or detrimental depends on the conditions the organism lives in. Lynx rufus. SURVEY . 6. Southwestern U.S. Southeastern U.S. Northeastern U.S. Whether a mutation is favored, neutral, or detrimental depends on the conditions the organism lives in. When dark-colored fur gives mice a 1% competitive advantage and 1% of the population begins with dark fur, in about 1,000 years, 95% of the population will have dark fur. 1)They have a dark fur coat to blend with the rocks 2)There are also light. 486 0 obj <>stream A competitive advantage of 5% would lead to 95% of this population becoming dark in less than 1000 years. Cat Collins 2/16/17 Natural Selection and the Rock Pocket Mouse (Text Sections 8.1, 8.5, 8.6, 8.9, 8.11-8.17, 8.22) Watch the video Natural Selection and the Rock Pocket Mouse (youtube, hhmi BioInteractive, 10:31 min) Answer the questions below by typing your answers into the document, then save the document. Instead, Nachman describes evolution occurring “again and again” on the lava flows. answer choices . Recall that genes encode traits. Why do dark-colored rock pocket mice on dark lava flows have white bellies? *�|�]�h���9�3��r��"]��ҷd�E>0?�k���$op,cg� ��M=� W�2����,�eV�݀�E[yN'���^�l�]�2i�3�_�:sW�;&�*K�oq��l0��V/?��O�珯 �� 30 seconds . Our records indicate you have visited this interactive video on this device before. The dark rock environment doesn’t cause dark-colored rock pocket mice to appear.