Vocabulary Prophase Metaphase Anaphase Telophase

The Cell Cycle Notes

Interphase The cell is growing and preparing to divide. The cell spends most of its life in interphase. There are three parts of interphase:

Interphase G1 (Growth/Gap) - the cell doubles in size and the number of organelles doubles. S (synthesis phase) – the DNA replicates. G2 (Growth/Gap) – cell prepares for division

NOW THE CELL IS READY TO BEGIN MITOSIS

MITOSIS A set of procedures that makes two identical cells (called daughter cells) There are four phases of mitosis: Prophase Metaphase Anaphase Telophase

Mitosis Prophase Anaphase Telophase Metaphase

Prophase

Prophase Chromosomes appear as the chromatin condenses. The nuclear membrane and the nucleolus breakdown. In animal cells, centrioles appear.

Prophase Spindle fibers begin to appear at the poles of the cell. The spindle fibers attach to the centromeres (the middle of the chromosomes).

Prophase

Metaphase

Metaphase The chromosomes move to the middle (equator) of the cell.

Anaphase

Anaphase Chromosomes are pulled back to the poles by the spindle fibers and are split into chromatids

Telophase

Telophase Spindle fibers and centrioles disappear Nuclear membrane and nucleolus reforms The chromatids uncoil back into chromatin

Telophase

Cytokinesis Occurs after mitosis The cytoplasm splits into 2 cells and the organelles are separated into the cells Plant cells: a new cell wall forms around the cells to complete cell division.

Cytokinesis Two identical cells are formed

The cycle repeats itself. -Interphase -Anaphase -Prophase -Telophase -Metaphase -Cytokinesis

Cell Cycle Microviewers Use the microviewers to work through the Microviewer Lab. Answer all questions!