Gizmo_ Mutation and Natural Selection (1).pdf - Name: Jaeda...

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Student Exploration: Evolution: Mutation and SelectionDirections: Follow the instructions to go through the simulation. Respond to thequestions and prompts in the orange boxes.Vocabulary:adaptation, allele, allele sequence, chromosome, evolution, fitness, gene,genotype, mutation, natural selection, phenotype, traitPre-lab Questions(Do these BEFORE using the Gizmo.)1.Imagine a white bug and a brown bug on a brown rock. Which bug do you think a bird wouldmost likely try to catch? Explain your choice.Name:Jaeda W, Ali, Nirvan, LochanaDate:12/9/20--
2.What if the bugs were sitting on a white sandy beach?
Gizmo Warm-upIn theEvolution: Mutation and SelectionGizmo, youwill see how a species’ fitness can change over timeas it becomes better adapted to its environment.1.On the SIMULATION pane, what is theAverage fitnessof the population?
2.On the CONTROLS pane, experiment with theBackground colorsliders.A.
B.
Question: Where does variation in a population come from?1.Observe: Hold your cursor over one of the insects. The two rod-like structures underGenotypeon the right side of the Gizmo represent chromosomes. The three letters next toeach chromosome represent alleles.
2.In the Gizmo, phenotype is expressed in red, green, and blue values.3.Run Gizmo: Move theSim. speedslider all the way to the left. ClickPlay(). You will seethe insects move to the left in pairs. The pairs mate and produce a set of four offspring. Assoon as you see at least one offspring with an oval around it, clickPause(). Move yourcursor over the circled offspring.4.Data: Move theMutation ratesliderto 3.0, and clickPlay. Allow the Gizmo to run foranother 10–15 generations. (You can see the generation number below the insects.)ClickPausewhen the parents are ready to have offspring. Find a set of two parents that hasfourdifferentchromosomes. (If you can’t find any, allow the Gizmo to run a few moregenerations and try again.) Write the allele sequences for these parents in the table below.

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