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Intro to Biotech

Intro to Biotech. Part 1 – Indirect Methods: Selective Breeding. In what ways have humans been changing the characteristics of organisms?. Today’s Essential Question. INDIRECT METHODS OF GENE MANIPULATION. Part I. Selective breeding/ Artificial Selection

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Intro to Biotech

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  1. Intro to Biotech Part 1 – Indirect Methods: Selective Breeding

  2. In what ways have humans been changing the characteristics of organisms? Today’s Essential Question

  3. INDIRECT METHODS OF GENE MANIPULATION Part I

  4. Selective breeding/ Artificial Selection • Select organisms with “desirable” traits to breed with one another We have been manipulating DNA for thousands of years!

  5. Certain traits have been “selected” for by humans Selective Breeding of Animals

  6. Selective Breeding of Dogshttps://www.youtube.com/watch?v=bi9Pa0DHG5Y

  7. Descendants of the wild mustard- Examples: Broccoli, cabbage, kale Certain parts of the plant have been selected for over many generations Selective Breeding of Plants...

  8. Evolution of modern corn (right) from ancestral teosinte (left). Selective Breeding of Plants Click HERE to learn more about the origins of modern corn.

  9. Click HEREto learn more about Cotton Candy Grapes Selective Breeding of Plants

  10. This method deals with the whole organism • Takes much longer than other types of gene manipulation (often times generations!) Things to remember about Selective Breeding

  11. Which type of breeding results in greater genetic diversity? Two types of Selective Breeding = +

  12. What type of selective breeding?

  13. In what ways have humans been changing characteristics of organisms? - Through selective breeding • What are the different types of selective breeding? - Inbreeding- breeding like with like - Hybridization- combining different traits Review

  14. Base your answers to questions 56 and 57 on the statement below and on your knowledge of biology. Selective breeding has been used to improve the racing ability of horses. 56. Define selective breeding and state how it would be used to improve the racing ability of horses. [2] ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ 57. State one disadvantage of selective breeding. [1] ________________________________________________ ________________________________________________

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