Cell Reproduction in Bacteria Binary Fission: asexual reproduction producing genetically identical cells

Cell Cycle: Eukaryotes Growth1: –Cell increases in size –Prepares for division Synthesis: –replicates the genetic material

Cell Cycle Growth 2: –Continue to grow Mitosis –Nucleus divides Cytokinesis: –Cell splits Interphase

4 Stages P rophase M etaphase A naphase T elophase

Prophase coiling of DNA into chromosomes Nucleolus and nuclear membrane break down and disappear Centrosomes appear Spindle fibers appear –Mitotic spindle

Metaphase Kinetochore fibers move chromosomes to the middle

Anaphase Chromatids of each chromosome separate at the centromere Move towards opposite poles * Now called individual chromosomes

Telophase Spindle fibers disassemble Chromosomes uncoil to chromatin state Nuclear envelope forms Nucleolus forms

Cytokinesis Cell membrane pinches inward Cleavage furrow: point at where two cells separate Cleavage furrow Cleavage furrow

Meiosis: production of gametes Diploid cell producing 4 haploid cells: 4 pollen grains

SPERMATOGENESIS OOGENESIS