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Biology Class Topics: Chapter 8 Test, Natural Selection Lab, Inbreeding Article

This class session includes a Chapter 8 test, a lab on natural selection and allele frequency, and a discussion on an article about inbreeding. Students are expected to review Chapter 8 and complete assigned readings.

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Biology Class Topics: Chapter 8 Test, Natural Selection Lab, Inbreeding Article

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  1. Hand in “Natural Selection and Allele Frequency lab” before the bell rings Review Chapter 8 Quiz 3 Chapter 8 Test Inbreeding article Notes – Chapter 9 “Failure is only postponed success as long as courage “coaches” ambition. The habit of persistence is the habit of victory.” Herbert Kaufman To assess learning about Chapter 8. Title: Biology 3/2/07 Class Topics Objectives: Wednesday, January 1, 20207:20 PM

  2. Class Assignments What By When • Chapter 8 Test 3/2/07 • Lab – Natural Selection and Allele Frequency 3/2/07 • Read 207-214 3/7/07 • Due this class period • Due next class period • Due in the future

  3. Grade Sheet 2A – p. 157 (5 pts.)

  4. Posttest Activities • Hand in the test • Pick up the article “Go Ahead and Kiss Your Cousin” • Read the article • Please do not write on this • Review the questions on the following slide

  5. Review Magazine article “Go ahead and kiss your cousin” • Why are neural degenerative diseases 8 times more common in Bradford than the rest of the UK? (62) • What are lethal alleles (62)? • Why is it likely that 80% of marriages in history were between 2nd cousins or closer? (62) • Why would some rich families encourage cousin marriages? (63) • Why do some cases of inbreeding lead to many diseases while others do not? (63) • What is outbreeding? (64) • What are some problems with outbreeding? (64)

  6. Johann Friedrich Miescher • 1868 - first scientist to isolate DNA • Studied pus from wounds • Called DNA - nuclein • Accomplishment not acknowledged at the time

  7. Frederick Griffith • working on vaccine for pneumonia (1928) • Strains • Smooth (IIIS) - virulent • Rough (IIR) - avirulent

  8. Graphic taken from the MIT Hypertext

  9. From: http://ribonode.ucsc.edu/HuGen/01_80H/01_80Hlec6.html

  10. Transformation • Something changed the IIR strain to the IIIS strain. What was it? • Transformation is the process of changing one form of bacteria into another form • trading genetic information • Between dead (HKIIIS) and living IIR

  11. Historical Perspective • Genetic material • Believed to be protein • More complex than nucleic acids • More common than nucleic acids

  12. Avery and Co.McCarty & MacLeod • 1944 - took Griffith’s experiment one step farther • found out what had caused transformation • Used enzymes to breakdown organic molecules - Carbohydrase, Protease, Ribonuclease, and Deoxyribonuclease

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