Survey
* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project
Download Mitosis - Honors Biology
Document related concepts
no text concepts found
Transcript
Mitosis How a new cell is formed! CHAPTER 10 CELL GROWTH AND DIVISION MONDAY 7/9/12…. MAIN IDEAS Why cells divide. What happens to a cell that gets too big. Chapter 10 - ANSWER THE FOLLOWING QUESTION • When a living thing grows, what happens to its cells? –HINT…Does the cell size increase as the living thing grows or does it make more cells? EXPLAIN! Why do cells divide? Growth Development Repair ACTIVITY: DRAW AND LABEL THE CELL CYCLE Cell Cycle Copyright Pearson Prentice Hall • Series of events a cell goes through as it grows & divides • During the cycle a cell: – Grows – Prepares for division – Divides into 2 new daughter cells – Repeats cycle Cell Cycle G1 M S G2 Cell Cycle ytokinesis elophase naphase etaphase rophase nterphase Interesting People Meet And Talk Constantly Cell Division Tightly coiled DNA contains genetic information Two identical parts of a chromosome – “sister chromatids” Holds sister chromatids together at the center Chromatin Loosely coiled DNA wrapped around histones Cell Cycle Events • Interphase - period between cell division • Divided into 3 phases: – G1 - cell grows – S - DNA is copied (replication) – G2 - synthesis of organelles & prepares for mitosis G1 M S G2 Mitosis Biologists divide the events of mitosis into four phases: (PMAT) • • • • Prophase Metaphase Anaphase Telophase Copyright Pearson Prentice Hall Mitosis ACTIVITY: MITOSIS FLIP BOOK Copyright Pearson Prentice Hall Cell Cycle Events • Mitosis (M) phase – – – – Prophase Metaphase Anaphase Telophase • Cytokinesis G1 M S G2 Section 10-2 Mitosis Prophase Spindle forming Prophase Centromere Click to Continue Copyright Pearson Prentice Hall Chromosomes (paired chromatids) Mitosis Spindle forming Prophase longest phase centrioles separate and a spindle fibers begin to form. chromatin condenses into chromosomes. nuclear envelope breaks down. Centromere Chromosomes (paired chromatids) Copyright Pearson Prentice Hall Prophase in Plant Cell Cell Cycle Events • Mitosis (M) phase – – – – Prophase Metaphase Anaphase Telophase • Cytokinesis G1 M S G2 Metaphase Section 10-2 Spindle forming Centrioles Nuclear envelope Chromatin Interphase Centromere Chromosomes (paired chromatids) Prophase Cytokinesis Spindle Centriole Telophase Nuclear envelope reforming Centriole Individual chromosomes Anaphase Metaphase Centriole Metaphase Chromosome • chromosomes line up across the center of the cell. Metaphase plate • chromosomes attach to spindle fibers. Spindle Metaphase in Plant Cell Cell Cycle Events • Mitosis (M) phase – – – – Prophase Metaphase Anaphase Telophase • Cytokinesis G1 M S G2 Mitosis Anaphase Individual chromosomes Anaphase Copyright Pearson Prentice Hall CHROMATIDS: Individual chromosomes Anaphase sister chromatids separate into individual chromosomes (chromatids). chromosomes continue to move until they have separated into two groups. Copyright Pearson Prentice Hall Anaphase in Plant Cell Cell Cycle Events • Mitosis (M) phase – – – – Prophase Metaphase Anaphase Telophase • Cytokinesis G1 M S G2 Mitosis Telophase Nuclear envelope reforming Telophase Copyright Pearson Prentice Hall Telophase chromatids Chromosomes gather at opposite ends of the cell and lose their distinct shape. new nuclear envelopes form around each cluster of chromosomes. Nuclear Envelope Copyright Pearson Prentice Hall Telophase in Plant Cell Cell Cycle Events • Mitosis (M) phase – – – – Prophase Metaphase Anaphase Telophase • Cytokinesis G1 M S G2 Cytokinesis Cytokinesis Cytokinesis Copyright Pearson Prentice Hall Daughter cells Cytokinesis cytoplasm pinches in half. Each daughter cell has an identical set of duplicate (same) chromosomes Copyright Pearson Prentice Hall Mitosis in Motion Mitosis & Cytokinesis What is happening??? a b d c e What does he mean? • Dude, mitosis starts in five minutes…. I can’t believe you’re not ready yet. Cytokinesis in Plants In plants, a structure known as the cell plate forms midway between the divided nuclei. Cell plate Cell wall Copyright Pearson Prentice Hall Mitosis in Motion Mitosis & Cytokinesis What is happening??? a b d c e • http://www.youtube.com/watch?v=N8gi1zCSO8 You can do this in pairs or by yourself!!! • • • • • Haiku + pictures Song/rap – include all phases Acrostic poem + picture -include all phases Riddle cards – pic + all phases Cartoon – one per frame Notebook Quiz 4. 1.) If a cell starts out with 34 chromosomes, how many chromosomes will it have after mitosis? 5. 2.) Why must a cell divide? 6. 7. 8. 9. 3.) What are 2 differences between a normal cell and a cancer cell?
Related documents