Presentation on theme: "Write everything that is BLACK"— Presentation transcript:
1 Write everything that is BLACK Section 5-2 “Mitosis”Write everything that is BLACK
2 KEY CONCEPT Cells divide during mitosis and cytokinesis.
3 When the cell grows large enough it needs to divide Cell Division is called MitosisFirst the DNA must coil up to make ChromosomesDNA double helixDNA and histonesChromatinSupercoiled DNA
4 One half of a duplicated chromosome is a chromatid DNA strands in the nucleus are called chromatinOne half of a duplicated chromosome is a chromatidSister chromatids are held together at the centromereTelomeres protect DNA and do not include geneschromatidtelomerecentromereCondensed, duplicated chromosome
5 Mitosis produces 2 genetically identical daughter cells Parent cellcentriolesspindle fiberscentrosomenucleus withDNAInterphase prepares the cell to divideDuring interphase, the DNA is duplicated
6 Prophase: chromosomes condense and spindle fibers form Mitosis divides the cell’s nucleus in 4 phasesProphase: chromosomes condense and spindle fibers formDraw a picture of this cell in your notes!
7 Metaphase: chromosomes line up in the middle of the cell Draw a picture of this cell in your notes!
8 Anaphase: sister chromatids separate to opposite sides of the cell Draw a picture of this cell in your notes!
9 Telophase: the new nuclei form and chromosomes begin to uncoil Draw a picture of this cell in your notes!
10 Cytokinesis (division of the cytoplams) differs in animal and plant cells Cytokinesis splits the 2 new cells…In animal cells, the membrane pinches closedIn plant cells, a cell plate forms