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