Mitosis and Cell Division Presentation PDF

Lesson 3 - MITOSIS Replicated chromosomes are separated into two new nuclei. Daughter cells are genetically identical. 6 stages of cell division: 1) Interphase 2) Prophase Mitosis 3) Metaphase 4) Anaphase 5) Telophase 6) Cytokinesis  CELL DIVISION Int...

Lesson 3 - MITOSIS Replicated chromosomes are separated into two new nuclei. Daughter cells are genetically identical. 6 stages of cell division: 1) Interphase 2) Prophase Mitosis 3) Metaphase 4) Anaphase 5) Telophase 6) Cytokinesis  CELL DIVISION Interphase - Cell is not dividing but still active! - Growing, and preparing for division - DNA is duplicated - Chromosomes are not visible  CELL STRUCTURES Centriole: Organizes the spindle fibres during mitosis  MITOSIS BEGINS! Prophase - Nuclear membrane and nucleolus break down. - 2 centrioles begin forming spindle fibers (made of microtubules)  CELL DIVISION Prophase Chromosomes condense and become visible  CELL DIVISION Prophase - Remember, every chromosome has been duplicated during the interphase. 2 copies of each chromosome: Father’s Mother’s Father’s Mother’s side side Mitosi side Father’s side Mother’s side side s *Colors are not accurate  CELL DIVISION Prophase - A centromere holds two copies of the same chromosome together. - Each identical chromosome is called a sister chromatid.  CELL DIVISION Metaphase - Microtubules attach near the centromere and the chromosomes move to the centre  CELL DIVISION Metaphase  CELL DIVISION Anaphase - Paired chromosomes separate at the centromere and move to opposite sides of the cell.  CELL DIVISION Telophase - Chromatids arrive at opposite poles of cell. - New daughter nuclei form. - Chromosomes disperse - Microtubules disperse  CELL DIVISION Cytokinesis - Cell membrane pinches into two daughter cells, each with one nucleus  CELL DIVISION Mitosis and cytokinesis: Review Mitosis  1 9 2 8 3 5 6 7 4  1 6 Centromere 5 Ribosome 2 4 DNA3 mRNA