Bellringer 10/22/13 Where is DNA located in the cell?
Topic: The cell cycle and Mitosis EQ: What are the phases of the cell cycle
CELL CYCLE http://www.neok12.com/php/watch.php?v=zX645478027c03150f647502&t=Cell-Division
How do little elephants grow up to be BIG elephants?
Animated Mitosis Cycle http://www.cellsalive.com/mitosis.htm Interphase Prophase Metaphase Anaphase Telophase & Cytokinesis
Why do animals shed their skin?
Cell Cycle Cells go through cycles…. Through the cell cycle: Organisms grow Develop-become more complex Replace old or damaged cells Produce new cells
Cell Cycle Cells cannot just split in half. They must make complete copies of themselves. The copies need their DNA. That is the recipe for building new cells. The DNA must be copied exactly. That is the only way each cell can live and work right. The steps that cells go through are called the Cell Cycle. Each step is called a phase.
How does the cell know how to divide? Cell Division Reproduction Growth Repair Why do cells divide? How does the cell know how to divide? The DNA has the instructions for all of the cell’s activities.
3 Phases of the cell cycle The sequence of development and division of a cell 3 Phases of the cell cycle Phase 1: Interphase – Preparation Phase 2: Mitosis – Cell division Phase 3: Cytokinesis – Splitting
Cell Cycle 1. Interphase 2. Prophase 3. Metaphase 4. Anaphase 5. Telophase 6. Cytokinesis How I remember them: I Play Music At The Club
Activity 1. Cut out figure 2 pg. 96 2. Glue on ISN 16 Quick Write 3. Explain what the cell cycle is. Explain why the cell cycle is crucial for living organisms.
Bellringer 10/24/13 What is happening in the cell during Interphase?
Topic: The cell cycle ) EQ: List the phases of the cell cycle in order.
REVIEW DNA replication – helix unzips
DNA replication – helix unzips
DNA replication – two strands are separated
DNA replication – each side is now a template
DNA replication – two identical strands of DNA Original DNA strands
What is the relationship between DNA, and chromosomes? Chromosomes are strands of DNA that are coiled up Chro
What is the relationship between DNA and chromosomes? Chromosomes are strands of DNA that are coiled up The chromosome is what splits during cell division.
Interphase What happens Cell doubles in size Looks like a plate of spagetti What happens Cell doubles in size DNA replicates (is copied) Organelles double in number Cells spend most of their time in interphase..
Interphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Mitosis: PROPHASE What happens DNA forms chromosomes Spindle forms Centrioles (help) cells during division. Cant be seen any other time. move toward opposite poles Nuclear membrane begins to disappear
Prophase Plant Cell Animal Cell Spindle fibers Centrioles Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Mitosis: METAPHASE What happens Nucleus has disappeared completely Chromosomes line up in the middle of the cell “equator”
Metaphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Summarizing Activity 1. Turn to pg. 100 2. Cut out the pictures representing prophase and metaphase. 3. Glue onto ISN 18 4. Fill in the missing blanks
Mitosis: ANAPHASE What happens Centromeres divide Chromatids separate and move to opposite poles
Anaphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Mitosis: TELOPHASE What happens Nuclear membrane forms around each group of chromosomes Chromosomes unwind Cytokinesis begins
Telophase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Cytokinesis Cytoplasm divides One cell becomes 2 cells What happens
The Cell Cycle-Describe what’s happening in each phase - Cell Division 35
Animal Mitosis Directions: Label the phases of mitosis and describe what is happening to the cell in each phase Interphase Prophase Metaphase Anaphase Telophase Cytokinesis