Mitosis Chapter 8 2 Phases of Mitosis Prophase
- Slides: 10
Mitosis Chapter 8. 2
Phases of Mitosis • • Prophase Metaphase Anaphase Telophase
Prophase • Chromatin (DNA) coils to form visible chromosomes – Sister chromatids visible • held together by centromere Spindle fibers Disappearing nuclear envelope Doubled chromosome
Metaphase • Chromosomes line up in middle of cell Centromere Sister chromatids
Anaphase • Centromeres split • sister chromatids pulled apart to opposite sides of cell
Telophase • Two daughter cells form • Cells separate • Cells proceed into the next interphase Nuclear envelope reappears Two daughter cells are formed
Cytokinesis • end of telophase • cytoplasm and organelles divide • Occurs differently in plants and animals
Cytokinesis In Animal Cells • plasma membrane pinches in along the equator to form 2 cells
Cytokinesis in Plant Cells • Plant cells have a rigid cell wall, so the plasma membrane does not pinch in. • Cell plate is laid down across the cell’s equator. • A cell membrane forms around each cell, and new cell walls form on each side of the cell plate until separation is complete.
Results of Mitosis • Unicellular organisms remain as single cells. • In multicellular organisms, cell growth and reproduction result in groups of cells that work together as tissue to perform a specific function. Cells Tissues Organ Systems
