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Dogs Decoded

PictureVariation within Species, BBC
For hundreds of years, humans have selectively bred species. Farmers selected crops with the best traits: tomatoes that were the most plump and full of flavor, lettuce with the largest leaves, flowers with the best color.  Broccoli, cauliflower, cabbage, and kale all originated from a single form of wild mustard weed.   Additionally, humans helped to develop modern dog breeds by breeding those with the most desirable traits.  These are examples of selective breeding, a form of causing a species to change and one form of evidence for biological evolution: the change of species over time.  This unit will examine the statistics of traits in a population, evidence for biological evolution, and what can influence the survival of an individual as well as a species.

​Unit Question:

Are humans deciding the fate of future species?

Unit Product

Students will select a threatened or endangered species and evaluate factors influencing the likelihood of extinction as well as illustrate an understanding of the evidence for evolution.

Unit Skills

  • Skill 1: Asking why species change or are introduced
  • ​Skill 5: Examining trends and patterns
  • Skill 6: Creating explanations of species change
  • Skill 7: Engaging in Argument from Evidence
  • Skill 8: Evaluating information sources

Unit Content

  • I can explain how common ancestry and biological evolution are supported by multiple lines of evidence 
  • I can evaluate how changes in environmental conditions may result in: (1) increases in the number of individuals of some species, (2) the emergence of new species over time, and (3) the extinction of other species 

Resources

Readings:
  1. UC Berkeley: Introduction to Evolution
  2. Science News: Shorter Winged Swallows Evolved around Freeways
  3. Science Daily News: Flashy Fish Adaptations
  4. Monsanto Is Going Organic in a Quest for the Perfect Veggie
  5. Here's what 9,000 years of breeding has done to corn, peaches and other crops


Presentations:
  1. Evidence for Evolution Notes
  2. Isolation & Speciation Notes
  3. Types of Selection (Directional, Stabilizing, Disruptive) Notes
  4. Howard Hughes Medical Institute: Selection in Action
  5. Punnett Square Review
  6. Tasmanian Tiger

Images:

  1. Chromosomes, chromatids, sister chromatids: what is the difference?

Vocabulary Flashcards:


Videos:

Dogs Decoded Student Schedule
Dogs Decoded Quizlet


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