Lecture Notes: Week 3 - Sales Cycle & Cell Division

Announcements Overview

• Lab Focus: Lab 3 focuses on the sales cycle, particularly cell division.
• Quizzes: Chapter 1 lecture quiz and Lab 1 quiz completed. Work progressing into Lab 2 and Chapter 2 Part 1.
• Schedule: Currently in Chapter 2 of lecture material focusing on chemistry of life (Sections 2.1 - 2.3). Next week will cover Section 2.4.
• Homework: Connect assignments due Saturday, Chapter 2 Part 1 lecture quiz due by Sunday.
• Grace Period: One day grace period available for submissions before late penalties apply.

Lab 3: The Cell Cycle

• Focus: Cell division, mainly mitosis, and an introduction to meiosis.
• Textbook Reference: Chapter 4.
• Assignments:
  • SmartBook and lecture pre-game activities.
  • Several virtual lab assignments on McGraw Hill Connect.
  • Virtual labs include interactive simulations with microscopes and cell viewing.
• Due Dates: Virtual Labs for Lab 2 due next Thursday, Lab 3 quiz opens on Fridays and is due by the following Friday.

Quizzes and Proctoring

• Review and Reminders:
  • Quizzes graded and feedback provided after due date.
  • Ensure proper camera setup during proctored quizzes.
  • No scratch paper, no additional people or noise, and no electronic devices are permitted in the testing environment.
  • Recommendations: Take quizzes during off-peak internet times, ensure computer is charged or plugged in.

Cell Division Overview

• Role of Cell Division:
  • Cellular reproduction, growth, and tissue repair.
  • Involves duplication of DNA and distribution to daughter cells.
• Cell Cycle Stages:
  • Interphase: Includes G1 (cell growth), S (DNA synthesis), and G2 (preparation for mitosis).
  • Mitosis: Prophase, metaphase, anaphase, telophase, followed by cytokinesis.
  • Cytokinesis: Division of the cytoplasm, resulting in two separate daughter cells.

Mitosis in Detail

• Prophase: Chromatin condenses into chromosomes, spindle fibers form, nuclear envelope disintegrates.
• Prometaphase: Chromosomes continue condensing, spindle fibers attach to kinetochores.
• Metaphase: Chromosomes align at the metaphase plate.
• Anaphase: Sister chromatids are pulled apart to opposite poles.
• Telophase: Chromosomes de-condense, nuclear envelopes reform, cleavage furrow forms in animal cells.
• Cytokinesis: Complete division into two daughter cells.

Meiosis

• Comparison to Mitosis: Two rounds of division producing four haploid daughter cells.
• Importance: Genetic diversity through crossing over and independent assortment.

Practical Application

• Identification Practice: Emphasized for lab quizzes.
• Study Aids: Use Quizlet and flashcards for practice, including terminology like chromatin, chromosome, centromere, etc.

Additional Notes

• Cancer Research: Understanding mitosis is crucial for cancer research.
• Lab Resources: Use virtual labs as a study resource, redo assignments for maximum points.
• Proctoring Setup: Reference proctoring module for proper quiz environment setup.

Focus on mastering the identification of cell cycle stages and understanding the fundamental processes of mitosis and meiosis for lab and lecture quizzes. Practice consistently using available resources and tools.