Section 5-2

1
Section 5-2Mitosis

• 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

4

• 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

5
Mitosis produces 2 genetically identical daughter
cells

• Interphase prepares the cell to divide
• During interphase, the DNA is duplicated

6

• Mitosis divides the cells 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