1. Mitosis/Meiosis

2. Bell Ringer 5 MIN. Write learning targets
Have your homework out and ready to turn in
Answer the following questions:
What kind of molecules easily cross the plasma membrane?
What is the cell membrane made of?
Draw a diagram of a cell in hypertonic solution. Show which direction the water will be moving.

3. Agenda Bell Ringer (5 minutes)
Introduction: Cell division in cancer (5 minutes)
Notebook Input (20 minutes)
Partner practice (30 minutes)
Independent Practice (20 minutes)
Exit Quiz (10 minutes)

4. What Causes Cancer?

5. Notebook Input We will be using a guided notes worksheet
Write what is in red!!!

6. Mitosis
Process of cell division that produces two genetically identical daughter cells (exact copies)
Asexual process

7. Chromosome
Chromatid
Centromere
Spindle
Centrioles

8. Order: iPMATc Pro=before Meta=middle A=apart Telo= the end
Break between divisions (intermission)
Cell grows and duplicates DNA
Chromatin condenses
Spindle forms
Nuclear membrane breaks down

9. Sister chromatids separate Chromosomes move apart
Chromosomes line up in the middle
Connected to spindle at centromere
Sister chromatids separate
Chromosomes move apart
Nuclear membrane reforms around each set of chromosomes
Spindle breaks apart

10. Division of cytoplasm

11. Meiosis
Process of cell division that produces four genetically different daughter cells
Sexual process

12. Body cell
Sex cell
Full # of chromosomes (1 set from dad, 1 from mom)
Half the # of chromosomes

13. Reduces # of chromosomes in new cells to half
Produces haploid egg and sperm (sexual reproduction)
Consists of two cell divisions that make 4 genetically different daughter cells

14. Independent assortment increases genetic variation
Crossing over: chromosomes overlap and exchange part of their chromatids, resulting in genetic variation
Independent assortment increases genetic variation
Homologous chromosomes pair up to form a TETRAD, crossing over
Homologous chromosomes line up randomly in the middle
Chromosomes reach opposite sides, new cells are now haploid
Homologous chromosomes randomly separated= independent assortment

15. Sister chromatids separate Sister chromatids move to the middle
Four cells produced
Each contains half of parent cell’s # of chromosomes
Chromatin condenses
Sister chromatids separate
Sister chromatids move to the middle

18. Partner Work 30 MIN. Complete the practice questions FIRST
Then, match the flashcards with your partner
Partner groups who FINISH COMPLETELY with all answers CORRECT will receive candy!

19. Independent Practice 20 MIN.
Work silently and independently to finish the worksheet!

20. Exit Quiz 10 MIN.

21. Home Learning
Summarize the processes of mitosis and meiosis in your own words. Write at least 3 sentences for EACH process. For example: “In mitosis, first the cell prepares for division. The nuclear membrane breaks apart and the chromosomes condense. Next…”