Cell Division & The Cell Cycle

Why do cells need to divide?

Growth Replace worn out cells Repair (healing) Asexual Reproduction

1.) Interphase

The PARENT CELL

Cell grows to full size & prepares to divide

DNA is COPIED!!!!!

This phase takes the longest

2a.) Mitosis- Prophase DNA condenses to

form chromosomes & they become visible (X)

Nuclear membrane breaks down into PIECES

2b.) Mitosis- Metaphase Chromosome line up

in the middle of the cell

Chromosomes attach to the spindle fibers

2c.) Mitosis- Anaphase The duplicated

chromosome splits & the chromatids (chromosome halves) move to opposite ends of the cell

◦ Chromatids move “AWAY” from each other

2d.) Mitosis- Telophase 2 new IDENTICAL

nuclei are formed

Cytoplasm pinches in the middle to form a waist

3.) Cytokinesis

2 DAUGHTER CELLS

Cell completely splits & 2 new IDENTICAL cells are formed

They are called “Daughter Cells”

◦ “Cytokinesis = Complete”