Cell Division: all cells come from pre- existing cells.

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Presentation transcript:

Cell Division: all cells come from pre- existing cells

2 Types of Division

1. Mitosis: cell division which produces 2 diploid, identical cells

2. Meiosis: cell division which produces 4 haploid cells

Cell Life Cycle 1.Interphase: G1, S, and G2 G = growth S = Synthesis 2.M phase: mitosis – nuclear division 3.Cytokinesis: cytoplasm division

Interphase 1. Interphase: DNA not visible -nucleus still intact

Phases of Mitosis 2.Prophase: chromosomes become visible -nucleus disintegrates

Phases of Mitosis 3.Metaphase: chromosomes connect at the centromere to spindle fibers -line up at the equatorial plate

Phases of Mitosis 4.Anaphase: spindle fibers recede -pull chromosomes apart -chromosomes retreat to opposite ends

Phases of Mitosis 5.Telophase: nucleus reforms Cytokinesis splitting the cell -2 daughter cells are formed