The Cell Cycle and Mitosis

By the end of today you will be able to: Name and describe the main events of the cell cycle.

The Cell Cycle The events of a cell’s life: Growth and metabolism Cell division

The Cell Cycle is divided into two parts Interphase – (when growth and metabolism takes place) M phase –(when mitosis and cell division occurs)

Interphase Mostly engaged in normal cell metabolism But also getting ready for cell division --The cell grows --DNA replicates --Other organelles duplicate

Most of the cell cycle is Interphase

Mitosis Prophase Metaphase Anaphase Telophase

What happens to DNA in mitosis? Chromatin condenses in chromosomes at the beginning of prophase (Chromatin is the complex of DNA and associated proteins found in the nucleus) Chromatin Chromosomes

Chromosome Replication Chromosomes are replicated to form identical copies of themselves. Two identical copies of a chromosome are called “sister” chromatids Centromere - area where the chromatids of a chromosome are attached

Cytokinesis -Cytoplasmic division and formation of two identical daughter cells

Checkpoint 1. The break down of a cell’s entire life is the _______ ________. 2. The phase of the cell cycle when the cell is growing, replicating DNA and getting ready for mitosis is _____________. 3-6. What are the four phases of Mitosis? 7. The process of a cell actually splitting in two is called _______________.

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