Cell Division 8 2 p Binary fission 148

Cell Division 8. 2 (p. • Binary fission = 148 -151) prokaryotic cell (e. g. bacterium) splits into 2 identical cells Single, circular chromosome is copied Cell grows then divides into 2 identical cells (asexual)

Cell Division 8. 2 (p. • Cell cycle = repeating set of 148 -151) events of a eukaryotic cell I P M A T INTERPHASE = between phase PROPHASE = before phase METAPHASE = next to each other phase ANAPHASE = opposite phase TELOPHASE = reorganize phase

Cell Division 8. 2 (p. • Mitosis = division of the 148 -151) cell into 2 identical copies (P, M, A, T) Sexually reproducing organisms

Cell Division 8. 2 (p. • Interphase = time between 148 -151) cell divisions What are the 3 subphases of Interphase? Most of cell’s life spent in interphase Cell grows (G 1 phase) Cell makes a full copy of the DNA (S phase) Cell prepares to divide (G 2 phase)

st phase of • Prophase = 1 Cell Division 8. 2 (p. mitosis (preparation) 148 -151) What is the difference between centromeres and centrosomes? DNA shortens and coils into tight chromosomes (pair of socks) Nuclear membrane disappears Centrosomes form at opposite poles of cell Spindle fibers attach like strings to the centromeres to pull chromosomes apart

Cell Division 8. 2 (p. • Metaphase = spindle fibers 148 -151) move the chromosomes to Where is the equator of the cell? the equator of the cell

Cell Division 8. 2 (p. • Anaphase = spindle fibers 148 -151) pull chromatids toward Where are the poles of a cell? opposite poles

Cell Division 8. 2 (p. • Telophase = chromatids 148 -151) loosen coils and nucleus begins to form again Cytokinesis = cell pinches in middle to separate into 2 In plant cells a new cell wall forms in the middle

Cell Division 8. 2 (p. 148 -151)

Cell Division 8. 2 (p. 148 -151)