2. MITOTIC CELL DIVISION Miss Charney Northville Central School

3. WHY DO CELLS REPRODUCE? Form of reproduction requiring only one parent called asexual reproduction Growth Repair and replacement of cells and/or cell parts

4. WHAT IS MITOSIS? Definition: process by which a cell’s genetic material divides, creating two complete sets of the cell’s genetic material Result: Two daughter cells that are genetically identical

5. Condensed, duplicated chromosome CHROMOSOME STRUCTURE Chromosomes are composed of the following: 1.Chromatids: paired strands that compose the chromosome 2.Centromere: tiny disk holding chromatids together chromatid telomere centromere telomere

6. INTERPHASE Definition: resting stage that occurs between cell divisions Involves 3 events: 1.Cell growth 2.Copying of DNA, or replication 3.Centrioles replicate

7. STAGE 1 : PROPHASE Chromosomes become clearly visible Nuclear membrane disintegrates Centrioles move to opposite ends, or poles, of the cell Thread-like structures called spindle fibers appear and extend between centrioles

8. STAGE 2: METAPHASE Chromosomes align in the center of the cell, or equator Chromosomes are attached to spindle fibers via centromeres

9. STAGE 3: ANAPHASE EARLY ANAPHASE: Sister chromatids split Chromatids move away from equator and toward the poles LATE ANAPHASE: Cell membrane begins to pinch forming a cleavage furrow

10. STAGE 4: TELOPHASE Two nuclear membranes form Spindle fibers disappear Cell membrane continues to pinch in and cytoplasm equally divides, a process known as cytokinesis