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Transcript
The Process of Cell Division Learning Objectives Describe the role of chromosomes in cell division. Name the main events of the cell cycle. Describe what happens during the four stages of mitosis. Describe the process of cytokinesis. Chromosomes In prokaryotic cells, DNA is packaged into a single, circular chromosome. Chromosomes In eukaryotic cells, DNA is packaged into multiple chromosomes. DNA double helix coils sister chromatids centromere nucleosome supercoils histone proteins Prokaryotic Cell Cycle Prokaryotes undergo binary fission. Eukaryotic Cell Cycle Eukaryotic cells have a more complex cell cycle than prokaryotic cells. Which Cell Cycle? bacteria plants M Phase Cell division occurs during M phase. Prophase The nucleus condenses and chromosomes become visible. The spindle begins to form. Metaphase Chromosomes line up at the center of the cell. centrioles chromatid centromere chromosome Anaphase Chromosomes move toward opposite poles. individual chromosomes Telophase The cell begins to divide into daughter cells. nuclear envelopes re-forming Cytokinesis Cytoplasm pinches in the center to form two daughter cells. Mitosis Overview List and describe the stages of mitosis. Interphase Cytokinesis 1 Prophase 4 Telophase 2 Metaphase 3 Anaphase