The Cell Cycle

The Life of a Cell Cells pass through different __________ in their lives These stages = __________ Begins when cell forms, and ends when cell divides Before division, has to copy its ______

Prokaryotic or Eukaryotic? Prokaryotic cells: simple! No membrane covered organelles, small circle of DNA. Split into 2 parts = ________________ Each new cells contains 1 copy of the DNA

Eukaryotic cells More ___________; more DNA DNA is in chromosome pairs = _____________ chromosomes Humans have 23 pairs, or 46 total

What do chromosome pairs look like?

The Cell Cycle

Phases of the Cell Cycle IPMAT Interphase: Cell _______ (G1 and G2), and copies its DNA (S = synthesis)

A Cell’s Life Interphase Mitosis Prophase Metaphase Anaphase Telophase

Phases of Mitosis Prophase: PREPARATION phase; DNA twists into _____________, nuclear membrane breaks down Metaphase: Chromosomes MEET in the ____________ of the cell Anaphase: Chromosomes ___________ and move APART Telophase: The cell ______ into two

Prophase Chromosomes starting to form, nuclear ______________ starts to break apart

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

Anaphase Hint: This is were the 2 sisters Ana and Ana are pulled apart to different ends of the cell…so sad.

Telophase Hint: Now the sisters are far apart and starting separate lives. They have to call each other by TELOphone.

Cytokinesis At the end of Telophase the cell membrane _____________ into two identical cells. Animal Cell Plant Cell In plant cells a cell plate forms and later becomes the cell membrane.

QUIZ The cell cycle is the cell’s what? What two main stages make up the cell cycle? What happens during Interphase? Mitosis is all about a cell doing what?

QUIZ CONT. In what phase of Mitosis do the chromosomes line up in the center of the cell? In what phase of Mitosis do the spindle fibers first pull the chromosomes apart? In what phase of the Mitosis do chromosomes start to form?