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 Cycle1. Interphase:

G1, S, and G2G = 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 reformsCytokinesis splitting the cell-2 daughter cells are formed