The%20Cell%20Cycle

1
The Cell Cycle
2
The Life of a Cell

• Cells pass through different stages in their
  lives
• These stages Cell Cycle
• Begins when cell forms, and ends when cell
  divides
• Before division, has to copy its DNA

3
Prokaryotic or Eukaryotic?

• Prokaryotic cells simple! No membrane covered
  organelles, small circle of DNA.
• Split into 2 parts Binary fission
• Each new cells contains 1 copy of the DNA

4
Eukaryotic cells

• More complex more DNA
• DNA is in chromosome pairs homologous
  chromosomes
• Humans have 23 pairs, or 46 total

5
What do chromosome pairs look like?
6
The Cell Cycle
7
Phases of the Cell Cycle

• IPMAT
• Interphase Cell grows (G1 and G2), and copies
  its DNA (S synthesis)

8
A Cells Life

• Interphase

• Mitosis
• Prophase
• Metaphase
• Anaphase
• Telophase

9
Phases of Mitosis

• Prophase PREPARATION phase DNA twists into
  chromosomes, nuclear membrane breaks down
• Metaphase Chromosomes MEET in the MIDDLE of the
  cell
• Anaphase Chromosomes separate and move APART
• Telophase The cell TEARS into two

10
Prophase

• Chromosomes starting to form, nuclear membrane
  starts to break apart

11
Metaphase
Hint Think of this as the meta or (middle)
phase where chromosomes line up in the middle of
the cell.
12
Anaphase

Hint This is were the 2 sisters Ana and Ana are
pulled apart to different ends of the cellso sad.
13
Telophase
Hint Now the sisters are far apart and starting
separate lives. They have to call each other by
TELOphone.
14
Cytokinesis
At the end of Telophase the cell membrane pinches
into two identical cells.
Animal Cell
Plant Cell
In plant cells a cell plate forms and later
becomes the cell membrane.
15
QUIZ

• The cell cycle is the cells what?
• Life cycle
• 2. What two main stages make up the cell cycle?
• Interphase and Mitosis
• 3. What happens during Interphase?
• During interphase the cell grows and copies its
  DNA.
• 4. Mitosis is all about a cell doing what?
• Mitosis is all about cells dividing in half
  and making sure each new cell has the exact same
  DNA as the parent cell.

16
QUIZ CONT.

• In what phase of Mitosis do the chromosomes line
  up in the center of the cell?
• Metaphase
• In what phase of Mitosis do the spindle fibers
  first pull the chromosomes apart?
• Anaphase
• In what phase of the Mitosis do chromosomes start
  to form?
• Prophase