week 2 - Artificial Selection
Walt
- I can explain genetic variation and variability
- I can explain artificial selection through real-life examples
Student Activity
Engage
Have students find pictures of their dogs or a dog they think is interesting
What are some of the diversity of characteristics you observe in different dogs
How many different dog breeds do you think there are?
Why might a breeder have selected different characteristics?
How did different breeds come to have these different characteristics?
Watch: https://www.youtube.com/watch?v=tgpBwnMBfBw
https://www.youtube.com/watch?v=kWUA7CLmJ9Y
Explore
Use internet and other resources to explore backgrounds in how different dog breeds came to be.
Take notes in science notebook of facts learned during exploration – cite sources
websites for exploration:
Purina Pro Club: Bettering the Breed
(https://purinaproclub.com/resource-library/bettering-the-breed)
Learn.Genetics –
https://learn.genetics.utah.edu/content/evolution/artificialnatural/
https://learn.genetics.utah.edu/content/cotton/evolution/
https://learn.genetics.utah.edu/content/evolution/corn/
Genetics of Dog Breeding
(http://www.nature.com/scitable/topicpage/genetics-of-dog-breeding-434)
What are the unique characteristics of different dog breeds?
Are all characteristics beneficial?
How is artificial selection different than natural selection?
What do you think are benefits of artificial selection.
Explain
Look up definitions of terms such as mutation, artificial selection, genetic isolation, founder effect, common ancestor, genetic bottleneck
Present a model – an evolutionary tree generated by artificial selection – showing how dogs diverged from a common ancestor.
Explain your model through the concepts of heredity, variation, mutation, etc.
Elaborate
Discuss how many genes might be responsible for the genetic diversity in dog shapes, colors, and sizes.
Discuss how the history of dog breeding created genetic isolation.
An interesting recent scientific finding is that the number of genes controlling diversity in dogs is much lower than expected (CanMap Project).
Journal articles to read and discuss
Ratliff, E. 2012. How to Build a Dog. National Geographic Feb. 2012
https://www.nationalgeographic.com/magazine/2012/02/build-a-dog/
Evaluate
Create a presentation on hypothetical dog evolutionary tree.
Discuss how artificial selection differs from natural selection. Explain how
different dog breeds came about by detailing the genetic mechanisms involved.
Engage
Have students find pictures of their dogs or a dog they think is interesting
What are some of the diversity of characteristics you observe in different dogs
How many different dog breeds do you think there are?
Why might a breeder have selected different characteristics?
How did different breeds come to have these different characteristics?
Watch: https://www.youtube.com/watch?v=tgpBwnMBfBw
https://www.youtube.com/watch?v=kWUA7CLmJ9Y
Explore
Use internet and other resources to explore backgrounds in how different dog breeds came to be.
Take notes in science notebook of facts learned during exploration – cite sources
websites for exploration:
Purina Pro Club: Bettering the Breed
(https://purinaproclub.com/resource-library/bettering-the-breed)
Learn.Genetics –
https://learn.genetics.utah.edu/content/evolution/artificialnatural/
https://learn.genetics.utah.edu/content/cotton/evolution/
https://learn.genetics.utah.edu/content/evolution/corn/
Genetics of Dog Breeding
(http://www.nature.com/scitable/topicpage/genetics-of-dog-breeding-434)
What are the unique characteristics of different dog breeds?
Are all characteristics beneficial?
How is artificial selection different than natural selection?
What do you think are benefits of artificial selection.
Explain
Look up definitions of terms such as mutation, artificial selection, genetic isolation, founder effect, common ancestor, genetic bottleneck
Present a model – an evolutionary tree generated by artificial selection – showing how dogs diverged from a common ancestor.
Explain your model through the concepts of heredity, variation, mutation, etc.
Elaborate
Discuss how many genes might be responsible for the genetic diversity in dog shapes, colors, and sizes.
Discuss how the history of dog breeding created genetic isolation.
An interesting recent scientific finding is that the number of genes controlling diversity in dogs is much lower than expected (CanMap Project).
Journal articles to read and discuss
Ratliff, E. 2012. How to Build a Dog. National Geographic Feb. 2012
https://www.nationalgeographic.com/magazine/2012/02/build-a-dog/
Evaluate
Create a presentation on hypothetical dog evolutionary tree.
Discuss how artificial selection differs from natural selection. Explain how
different dog breeds came about by detailing the genetic mechanisms involved.