Bean Bunny Evolution through Natural Selection
Explore the concept of natural selection and its impact on gene frequency in rabbits through the evolution of Bean Bunny. Discover how the alleles for fur (F) and no fur (f) dictate survival in different environments over generations. Dive into possible mating combinations, hypothesis creation, and designing experiments to test hypotheses regarding gene frequency changes over time.
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Presentation Transcript
Bean Bunny Evolution CREST MARCH 15, 2016
Which bunny will survive the cold Indiana winters?
Bean Bunny Evolution How does natural selection affect gene frequency over several generations? What will happen to the F and f alleles in rabbits over 5 generations?
Biology refresher before we begin.. Natural Selection process by which organisms best-suited to their environmental conditions are most likely to survive and reproduce Gene section of a chromosome that contains information coding for that trait Allele one of two or more alternating forms of a gene Gene frequency how often the different alleles of a gene occur Evolution on a genetic level is a change in frequency of alleles in a population over a period of time
Bean Bunny Evolution Bean Bunny Evolution Allele Letter Allele for Allele type F Fur Dominant f No fur Recessive
Bean Bunny Evolution Bean Bunny Evolution Possible mating combinations homozygous dominant FF Fur Ff heterozygous Fur homozygous recessive ff No Fur
Bean Bunny Evolution How does natural selection affect gene frequency over several generations? What will happen to the F and f alleles in rabbits over 5 generations? With a partner create a hypothesis from this opening lab question
Bean Bunny Evolution If rabbits with F (fur) and f (no fur) alleles mate for 5 generations, then the gene frequency of F alleles will increase and the gene frequency of f alleles will decrease.
Bean Bunny Evolution Using simple materials, how could we design an experiment to test our hypothesis?
Todays experiment Red beans F allele for fur White beans f allele for no for Paper bag Indiana fields, setting for rabbits mating Paper plates mating results
Todays procedure Place red and white beans in brown bag Select 2 beans at a time Place pair in appropriate plate (FF, Ff, ff) Record number of pairs in data chart for first three columns Safety don t eat/throw the beans!
Trial run from the chief engineer 11 pairs 28 pairs SET ASIDE
Trial run from the chief engineer Let s get some materials and take data for 5 trials!
Graphing Graph, graph and graph!! Superb life skill graphs are everywhere! Graphing mechanics Scatter plots Best fit lines Analyzing trends Direct/indirect relationships
Scientific Argumentation CLEVER CLaim - make statement about experiment EVidencE use data, graphs to explain Reasoning explain how evidence supports the claim
Analysis Questions and Assessment Ramp up the rigor with a high level of questioning Question students as they collect and graph data Consider having check points in data collection Does this data make sense? Do you see any trends? Lesson assessment is AP style questioning, application of lab learnings
Successes and Challenges Reflect for a few moments on the successes and challenges of implementing this lesson in a classroom You can use this reflection technique with your students
Bean Bunny Evolution Lesson Objective Model evolution by natural selection of the gene frequency in two alleles in a population of organisms Calculate and graph gene frequency Connection to AP Biology genetics, process of evolution Great math applications!
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