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6th grade mitosis

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Shay Fulton

on 20 November 2012

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Transcript of 6th grade mitosis

By: Shay Fulton The Process of Mitosis Your body is made up of cells. Cells go through different stages call mitosis. Mitosis is the process of the cells cloning themselves. This is how you grow and develop. In your cells there are chromosomes. In chromosomes is DNA. DNA is what makes you look like you do. The Start of Mitosis The process of mitosis is the dividing of a cells nucleus, the parent cell (original cell) divides into 2 daughter cells (the cloned cells). The genetic information (DNA) is exactly the same in both daughter cells. Interphase (G1, S, G2) Interphase in the period of time between the separate cell divisions
G1- During the G1 phase of interphase the cell is growing to be able to hold everything it needs for mitosis.
S-stage- during S-stage the chromosomes double. You start with 46 chromosomes in each cell (23 from mom and 23 from dad). After doubling you have 92. Each DNA strand unwinds into 2 separate parts.
G2- In the G2 stage the chromosomes are beginning to condense and coil. Prophase Chromosomes begin to retreat back into original form, 4 arms connected around a center point (centromere) like an X. At this point the chromosome is actually 2 identical copies of one another. Each copy is called a chromatid. the centrioles begin to make threads. Pro- Metaphase (before the Metaphase) The centrioles gradually move towards opposite ends of the cell. The threads (spindle fibers) of the centrioles attach to the chromosomes. Metaphase The chromosomes line up along the center of the parent cell. In this stage the spindle fibers also begin to pull the chromosomes to opposite ends of the cell. Anaphase The spindle fibers start to pull the chromatids toward opposite ends of the cell. Telophase The chromatids are now at their opposite ends of the stretched out cell and 2 new nuclear membranes form around them. Mitosis itself is now complete. DNA Threads Cytokinesis The rest of the cell divides into 2 individual cells, and the dividing of the cells is all the way complete. Vocabulary Cell- the basic unit of all living matter.
Centrioles- a pair of cylinder like thingd used in the process of mitosis.
Centromere-The region of the chromosome to which the spindle fiber is attached during cell division. Is also the point at which the chromatids join.
Chromatids- Either of the two strands formed when a chromosome duplicates itself.
Chromosome- A structure in all living cells that consists of a single molecule of DNA.
DNA- carries the genetic information in the cell and is capable of self-replication. consists of two long chains of nucleotides twisted into a double helix and joined by hydrogen bonds.
Helix-A spiral form or structure.
Hydrogen Bond- a chemical bond consisting of a hydrogen atom.
Mitosis- The process in cell division by which the nucleus divides.
Nuclear Membrane- The double-layered membrane enclosing the nucleus of a cell.
Nucleus- The central portion of a cell. "the brain"
Nucleotide- Nucleotides are the basic building blocks of nucleic acids. Cites 1. VOCAB: http://www.thefreedictionary.com/cell1. 2. PICTURES&INFO: http://www.pbs.org/wgbh/nova/body/how-cells-divide.html
3. Class Notes TO: BROTHER So what is happening to your skin is you are producing more skin cells that are needed for your body. My guess would be that the doctor will give you a medicine to help slow the production rate of you cells. (2.) (2.) (2.) (2.) (2.) (2.) (2.) (2.)
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