CELL DIVISION

Cell Life Cycle  Two major periods: 1. Interphase: cell grows and undergoes usual activities 2. Cell division: cell reproduces asexually

Prepare: DNA Replication  DNA helix uncoils and separates into 2 nucleotide chains  Each chain acts as a template for building a new nucleotide strand Complementary pairing of nucleotide bases

DNA Replication

Cell Division  Mitosis: Refers to process of replication of the genetic material and the nucleus

Interphase:  Cell is just living  Growing and normal metabolic processes  At the END of interphase: replication of chromosomes  Replication of centriole (centrosome)

Chromosome

Prophase:  Centrioles separate and begin to move to opposite sides  Nuclear envelope breaks apart  Mitotic spindle forms (microtubules)

Prophase:  Spindle fiber attaches to centromeres  Also begin to PUSH

Metaphase:  Aligning of chromosomes at center  Everything lines up

Anaphase:  Microtubules pull chromosomes apart and to opposite sides  Also work to push cell apart

Telophase:  Chromosomes uncoil  Formation of nuclear envelope  MITOSIS DONE

Cytokinesis  At the very end of telophase  Formation of cleavage furrow (microfilaments)  Both cells back to interphase

Cell Division  IPMAT  Interphase  Prophase  Metaphase  Anaphase  Telophase

Cell Division Packet  Groups of 4 or 5  Each group member must draw out and label assigned event of cell division (IPMAT)  Staple the sheets in order  Write your name on your specific sheet