Cell Cycle & Mitosis

Cell CycleCell Cycle = IMPAT

I = InterphaseMPAT= Stages of Mitosis

Cell Cycle

Mitosis•Interphase (stage before mitosis!)

•G1 + S + G2 = Interphase

• Cell grows, makes more cytoplasm and organelles duplicate, copies DNA, and gets ready to divide

Prophase

•Chromosomes shorten & thicken

•Centrioles move to opposite poles of the cell

•Spindle fibers extend from the centrioles toward each chromosome

•Nuclear membrane dissolves

Metaphase

•During late prophase chromatids begin to move toward the cell equator (metaphase plate)

•At metaphase the chromatids are aligned at the equator

Anaphase

•Chromatids begin to move apart, toward opposite poles

Telophase

•Chromosomes reach opposite poles of the cell

•Spindle fibers dissolve

•Nuclear membrane reforms at each end of the cell

Cytokinesis•Cytokinesis = splitting of the

cytoplasm

•Not an actual “phase of mitosis”.

•The division of cytoplasm after separation of the chromosomes

•In plant cells, a new cell wall forms to divide the two daughter cells (CELL PLATE)

•In animal cells, the cleavage furrow forms