Hand in the W.S. Meiosis before the bell rings

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Class Topics
Title Biology 1/19/07
Objectives

• To review learning about genetic variation due to
  meiosis and about gametogenesis

• Hand in the W.S. Meiosis before the bell rings
• Review Chapter 7 Quiz 1
• Review Chapter 7
• Writing
• Dont let what you cannot do interfere with what
  you can do.
• John Wooden

Tuesday, July 14, 2015 542 PM
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Class Assignments
By When
What

• Meiosis W.S. 1/19/07
• Disability Essay 1/19/07
• Chapter 7 Test 1/23/07
• Due this class period
• Due next class period
• Due in the future

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Grade Sheet
2A p. 157 (5 pts.)
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Venn Diagram

• Homologous chromosomes
• somatic cells
• gametes
• 1 division
• tetrads
• cytokinesis
• chromatids

• Synapsis
• unpaired chromosomes
• diploid cells
• crossing over
• 2 divisions
• haploid cells
• ovum

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Sperm vs Ovum

• Sperm
• size - small
• moves by flagellum
• millions made per day
• no food
• produced in testes

• Ovum
• size - very large
• no movement
• fixed number
• all made by 3rd month of development
• Yolk (amnion) supplies food
• Ovaries

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Test Review Topics

• Separation of homologues
• Differences between
• Anaphase and anaphase I
• Metaphase, metaphase I, metaphase II
• Chromosome actions and views in meiosis and
  mitosis (pictures)

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Test Review topics

• Crossing over
• What?
• When?
• Where in the body?
• Why?
• How?
• What if crossing over doesnt occur?
• How often?

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Test Review topics

• Gametogenesis
• Handout (9 questions and labels)
• In males
• Differences between sperm and spermatids
• In females
• Why are polar bodies formed?
• Unequal division of what?
• Differences between sperm and ova

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Essay

• A man is telling you that he has pet opossums (2n
  22) that have babies (joeys) that arent
  identical twins, but are identical genetically.
  Explain in a paragraph why that would be highly
  unlikely to have occurred. Reference and explain
  independent assortment, crossing over, and random
  fertilization.

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2 sheets of paper

• 1st sheet to hand in
• Name, todays date, class period
• Disability essay
• 2nd sheet
• Notes
• Brainstorming
• organization

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Grading

• Focus
• Clearly stated opinion
• Stay on topic (opinion)
• Conclusion ties all together
• Support/Elaboration
• Specific examples used
• Examples are explained and relevant
• Organization
• Logical sequence
• Paragraphs are appropriate
• Conclusion and introduction used
• Transitional devises used
• Integration
• Does the paper deal the appropriate topic
• Did you follow the assignment
• Conventions
• Grammar

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Disabilities

• Read the article (please do not write on the
  paper)
• Surgery to stunt disabled girls growth raises
  ethical questions
• Develop your opinion
• Do you agree with the parents?
• Do you disagree with the parents?
• Brainstorm ideas to back up your opinion
• This is the most important part of your essay
• Think about the other opinion and how someone
  would justify their opinion (multiple viewpoints)

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Writing the essay

• Prewrite
• Look at your ideas (brainstorming)
• What is the best sequence of points?
• Write
• Introduction state the topic and your opinion
  of the topic
• Body support your opinion with facts or
  strongly help beliefs
• Stay focused on topic, do not stray!
• Conclusion be brief
• Postwrite
• Proofread reread it at least once

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Pattern Puzzle

• Each group will get a packet of paper strips.
• Put them in order