Hand in

1
Class Topics
Title Biology 3/2/07
Objectives

• To assess learning about Chapter 8.

• 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

Thursday, April 30, 2015 1051 AM
2
Class Assignments
By When
What

• 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_80H
lec6.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 Griffiths experiment one step
  farther
• found out what had caused transformation
• Used enzymes to breakdown organic molecules -
  Carbohydrase, Protease, Ribonuclease, and
  Deoxyribonuclease