1. Mitosis

2. Phases of the Cell Cycle

3. Mitosis (PMAT) Prophase Metaphase Anaphase Telophase
What is the purpose of mitosis?
Replication/Growth
Repair
Replacement

6. Interphase G1 phase S phase G2 phase Normal cell activity
Enzymes double
S phase
DNA replication
Chromosomes double
G2 phase
Preparation for Mitosis
Organelles double

7. Prophase Chromatin condenses into chromosomes Centrioles separate
Spindle begins to form
Nuclear envelope breaks down
Nucleolus breaks down

8. Chromatin vs Chromosome
How are chromatin and chromosomes different from each other?
Chromosomes
Chromatin
Complex of DNA wrapped around proteins called Histones
What are sister chromatids?
What holds the sister chromatids together?
Try to answer these questions before class!!

9. Metaphase Chromosomes line up at metaphase plate
Spindle fibers connect to chromosomes at its centromere

11. Anaphase
Sister chromatids separate into individual chromosomes and are moved apart
**image of anaphase with kinetochore fibers, aster, etc.

12. Telophase Cleavage furrow forms Chromosomes uncoil into chromatin
Cytoplasm pinches in
Chromosomes uncoil into chromatin
Nuclear envelope reforms
Spindle breaks apart
Centrioles disappear
Nucleolus becomes visible
Cleavage furrow

13. Cytokinesis
Cell separation
Two identical daughter cells form

14. Mitosis vs Meiosis What kind of cell undergoes mitosis?
Somatic Cells
Body Cells
What kind of cell undergoes meiosis?
Gametes
Sex Cells
How many chromosomes does a haploid human cell have?
23 chromosomes
-N number of chromosomes
How many chromosomes does a diploid human cell have?
46 Chromosomes
-2N number of chromosomes

15. Organism complexity What determines how complex an organism is?
The number of genes or the number of proteins made?
Proteins