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Section 5-2 Mitosis Section 5-2 Mitosis Write everything that is BLACK.

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Presentation on theme: "Section 5-2 Mitosis Section 5-2 Mitosis Write everything that is BLACK."— Presentation transcript:

1 Section 5-2 Mitosis Section 5-2 Mitosis Write everything that is BLACK

2 5.2 Mitosis and Cytokinesis KEY CONCEPT Cells divide during mitosis and cytokinesis.

3 5.2 Mitosis and Cytokinesis DNA double helix DNA and histones Chromatin Supercoiled DNA When the cell grows large enough it needs to divideWhen the cell grows large enough it needs to divide Cell Division is called MitosisCell Division is called Mitosis First the DNA must coil up to make ChromosomesFirst the DNA must coil up to make Chromosomes

4 5.2 Mitosis and Cytokinesis DNA strands in the nucleus are called chromatin One half of a duplicated chromosome is a chromatidOne half of a duplicated chromosome is a chromatid Sister chromatids are held together at the centromereSister chromatids are held together at the centromere Telomeres protect DNA and do not include genesTelomeres protect DNA and do not include genes Condensed, duplicated chromosome chromatidtelomere centromere telomere

5 5.2 Mitosis and Cytokinesis Parent cellcentrioles spindle fibers centrosome nucleus with DNA Interphase prepares the cell to divideInterphase prepares the cell to divide During interphase, the DNA is duplicatedDuring interphase, the DNA is duplicated Mitosis produces 2 genetically identical daughter cells

6 5.2 Mitosis and Cytokinesis Mitosis divides the cells nucleus in 4 phasesMitosis divides the cells nucleus in 4 phases Prophase: chromosomes condense and spindle fibers form Draw a picture of this cell in your notes!

7 5.2 Mitosis and Cytokinesis Metaphase: chromosomes line up in the middle of the cell Draw a picture of this cell in your notes!

8 5.2 Mitosis and Cytokinesis Anaphase: sister chromatids separate to opposite sides of the cell Draw a picture of this cell in your notes!

9 5.2 Mitosis and Cytokinesis Telophase: the new nuclei form and chromosomes begin to uncoil Draw a picture of this cell in your notes!

10 5.2 Mitosis and Cytokinesis Cytokinesis (division of the cytoplams) differs in animal and plant cellsCytokinesis (division of the cytoplams) differs in animal and plant cells –Cytokinesis splits the 2 new cells… –In animal cells, the membrane pinches closed –In plant cells, a cell plate forms


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