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What Is Cell Division?
Transcript of What Is Cell Division?
A Lot Like This Since Most Of You Said No Let's Start Off With A Cell 1. Interphase 2. Mitosis: Prophase 3. Mitosis:Metaphase 4. Mitosis:Anaphase 5. Mitosis:Telophase 6. Cytokinesis Cell Cycle/Cell Division Next is... Meiosis That was a video showing you the steps and process of Mitosis. Interphase During Interphase, the cell grows to its mature size, makes a copy of its DNA, and prepares to divide into two cells. Two cylindrical structures called centrioles are also copied. It is the longest process in the cell cycle. Prophase is when the chromatin in the nucleus condenses to form chromosomes. The pairs of centrioles move to opposite sides of the nucleus. Spindle fibers form a bridge between the ends of the cell. The nuclear envelope breaks down. Hello:) Metaphase is when the chromosomes line up across the center of the cell. Each chromosome attaches to a spindle fiber at its centromere. Anaphase is the process during mitosis when the centromeres split. Then the two chromatids separate. One chromatid is drawn by its spindle fiber to one end of the cell. The other chromatid moves to the opposite end. The cell stretches out as the opposite ends are pushed apart. Telophase is the next to last step of cell division. During Telophase the chromosomes begin to stretch out and lose their rodlike appearence. A new nuclear envelope forms around each region of chromosomes. Cytokinesis is the last step in Cell Division. Cytokinesis is not a part of mitosis. But it is when the cell membrane pinches in around the middle of the cell. The cell splits in two. Each daughter cell (exact copy of original cell) ends up with an identical set of chromosomes and about half of the organelles of the original. Meiosis Video Structure of DNA http://www.johnkyrk.com/meiosis.html The structure of DNA looks like... A twisted ladder Or a spiral staircase DNA Is Made Up Of 4 Different Nitrogen Bases. They are... Adenine Guanine Cytosine And Thymine! BY Mitosis is the process by which a eukaryotic cell separates the chromosomes in its cell nucleus into two identical sets in two nuclei. DNA is the hereditary material in humans and almost all other organisms. Each rung is made up of molecules called nitrogen bases. DNA Replication
(10 Hours) Preparation for Division
(2 Hours) Mitosis and Cytokinesis
1 Hour Growth
(9 Hours) Interphase DNA Replication is a biological process that occurs in all living organisms and copies their DNA. So What EXACTLY is Cell Division? Cell Division is the process by which a parent cell divides into two or more daughter cells A chromosome is an organized structure of DNA and protein that is found in cells. Vocabulary Meiosis Mitosis http://www.cellsalive.com/meiosis.htm Thank you for allowing us to teach you about Cell Division! And we hope that you understand. THE END