Natural Selection Kit

Natural Selection Kit

Natural Selection Kit

171200
Regular price $109.00
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The dramatic increase in the frequency of dark moths, and corresponding decrease in the frequency of light moths, in 19th-century England's peppered moth population define the investigative phenomenon. To answer the driving question, students read about the phenomenon in the pre-lab and make an initial claim about it. Students model 5 generations of moths, gathering evidence of genotype and allele frequencies as environmental variables change. They compare calculated Hardy-Weinberg frequencies for a population in genetic equilibrium with the observed frequencies of their model. After their statistical analysis, students revise their claim about the cause of the phenomenon.

Time Requirement
Total, 195 minutes. Teacher prep and pre-lab, 65 minutes. Investigation, 100 minutes. Assessment, 30 minutes.

Digital Resources
Includes 1-year access to digital resources that support 3-dimensional instruction for NGSS. Digital resources may include a teacher manual and student guide, pre-lab activities and setup videos, phenomenon videos, simulations, and post-lab analysis and assessments.

Performance Expectation(s)
HS-LS4-3 and HS-LS4-4

Crosscutting Concepts
Patterns

Disciplinary Core Ideas
LS4.B: Natural Selection

Science and Engineering Practices
Analyzing and Interpreting Data

Learning Objectives

  • Model how natural selection affects a population's genetic equilibrium when an environmental change is introduced.
  • Apply concepts of statistics and probability to calculate and analyze allele, genotype, and phenotype frequencies in a population.
  • Use mathematical reasoning to evaluate whether a population is in the process of natural selection.
  • Make a claim, supported by evidence, about changes in the distribution of traits in the peppered moth population.

Prerequisite Knowledge and Skills
Students should understand basic Mendelian genetics. They should be familiar with the following terms: traits, genes, alleles, recessive, dominant, homozygous, heterozygous, genotype, and phenotype. They should also be able to solve polynomial equations and simultaneous algebraic equations.

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Merlan Scientific warrants that each product will be free of defects in materials and workmanship for a period set forth in its published user manuals for its system products and for a period of one (1) year for its component products. The warranty commences on the date the product is shipped by Merlan Scientific. Merlan Scientifics’ sole liability and responsibility under this warranty is to repair or replace any defective product, which is returned to it by the buyer, and which Merlan Scientific determines qualifies for repair or replacement under the terms of the applicable warranty. The product returned to Merlan Scientific for warranty service will be shipped to Merlan Scientific at the buyers expense and will be returned to buyer at Merlan Scientifics’ expense. In no event shall Merlan Scientific be responsible under its warranty for any defect, which is caused by negligence, misuse or mistreatment of a product, or for any unit, which has been altered or modified in any way. The warranty of repaired and replacement products shall terminate with the original warranty of the product.

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