Biology - Oreo Mitosis PDF
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This document is about the stages of mitosis. It explains the stages of prophase, metaphase, anaphase and telophase, including their key processes and features. Visual aids clarify the processes.
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before mitosis: INTERPHASE centrosome Cell Prepares to Divide Genetic material doubles Creates SISTER CHROMATIDS held together by centromere Mitosis stage 1: PROPHASE centrosome centromere...
before mitosis: INTERPHASE centrosome Cell Prepares to Divide Genetic material doubles Creates SISTER CHROMATIDS held together by centromere Mitosis stage 1: PROPHASE centrosome centromere (holds together sister chromatids) Condensation of chromatin Chromatin – DNA + proteins that make up chromosomes Centrioles (or poles) appear and begin to move to opposite end of cell The centrioles begin the formation of the spindle fibers between the poles Mitosis stage 2: METAPHASE M - MIDDLE mitotic spindle Sister chromatids line up in center and attach to spindle fibers Mitosis stage 3: ANAPHASE A - AWAY Sister chromatids separate and are pulled to opposite ends of the cell by spindle fibers Mitosis stage 4 (final): TELOPHASE Two new nuclei and nuclear membranes form. Chromosomes appear as chromatin (thread instead of rods) Mitosis Ends After Mitosis: CYTOKINESIS C = CELL MEMBRANE Cell Membrane moves inward to create two daughter cells each with its own nucleus with identical chromosomes. Interphase Prophase How phases Metaphase Anaphase look: UNDER THE MICROSCOPE Telophase Interphase
