The Cell Cycle and MitosisCell Cycle

Chromosomes o Made of DNA o Each chromosome consists of two sister chromatids attached at a centromere

Chromosome

Cell Cycle o During the cell cycle, a cell grows, prepares for division, and divides to form 2 daughter cells, each with each of which then begins the cycle again.cell cycle o Order of cell cycle is: Interphase Prophase Metaphase Anaphase Telophase Cytokensis (IPMATC)

Interphase Interphase – growth and regular cell activity. o Most of cell life is spent in Interphase. o longest period of the complete cell cycle o DNA replicates

Mitosis o Division of somatic cells. o 4 phases. o Remember Interphase is NOT part of Mitosis. Mitosis

Prophase o First stage of Mitosis o Chromatin condenses into chromosomes o Centrioles separate and spindle fiber begins to form. o Nuclear membrane breaks down

Prophase

Metaphase o Second Phase of Mitosis mm o Chromosomes line up in middle of cell. (meet in middle) o Each chromosome connects to spindle fiber at centromere.

Metaphase

Anaphase o Third Phase of Mitosis o Sister chromatids pull apart or away o individual chromosomes move to opposite ends of the cell.

Anaphase

Telophase o Fourth and Final Stage of Mitosis o Chromosomes gather at opposite ends of cell, lose distinct shapes o Two new nuclear membranes form.

Telophase

Cytokinesis o NOT part of Mitosis o Division of cytoplasm after mitosis o Contractile ring tightens creating "cleavage furrow" o Each daughter cell has an identical set of duplicate chromosomes

Cytokinesis

Cell Cycle

o Review process Review o Synchronized Swimming MitosisSwimming

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