1. Write everything that is BLACK
Section 5-2 “Mitosis”
Write everything that is BLACK

2. KEY CONCEPT Cells divide during mitosis and cytokinesis.

3. When the cell grows large enough it needs to divide
Cell Division is called Mitosis
First the DNA must coil up to make Chromosomes
DNA double helix
DNA and histones
Chromatin
Supercoiled DNA

4. One half of a duplicated chromosome is a chromatid
DNA strands in the nucleus are called chromatin
One half of a duplicated chromosome is a chromatid
Sister chromatids are held together at the centromere
Telomeres protect DNA and do not include genes
chromatid
telomere
centromere
Condensed, duplicated chromosome

5. Mitosis produces 2 genetically identical daughter cells
Parent cell
centrioles
spindle fibers
centrosome
nucleus with
DNA
Interphase prepares the cell to divide
During interphase, the DNA is duplicated

6. Prophase: chromosomes condense and spindle fibers form
Mitosis divides the cell’s nucleus in 4 phases
Prophase: chromosomes condense and spindle fibers form
Draw a picture of this cell in your notes!

7. Metaphase: chromosomes line up in the middle of the cell
Draw a picture of this cell in your notes!

8. Anaphase: sister chromatids separate to opposite sides of the cell
Draw a picture of this cell in your notes!

9. Telophase: the new nuclei form and chromosomes begin to uncoil
Draw a picture of this cell in your notes!

10. Cytokinesis (division of the cytoplams) differs in animal and plant cells
Cytokinesis splits the 2 new cells…
In animal cells, the membrane pinches closed
In plant cells, a cell plate forms