Presentation on theme: "Write everything that is BLACK"— Presentation transcript:
1Write everything that is BLACK Section 5-2 “Mitosis”Write everything that is BLACK
2KEY CONCEPT Cells divide during mitosis and cytokinesis.
3When 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
4One 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
5Mitosis produces 2 genetically identical daughter cells Parent cellcentriolesspindle fiberscentrosomenucleus withDNAInterphase prepares the cell to divideDuring interphase, the DNA is duplicated
6Prophase: 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!
7Metaphase: chromosomes line up in the middle of the cell Draw a picture of this cell in your notes!
8Anaphase: sister chromatids separate to opposite sides of the cell Draw a picture of this cell in your notes!
9Telophase: the new nuclei form and chromosomes begin to uncoil Draw a picture of this cell in your notes!
10Cytokinesis (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