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Jovana Chavez

on 1 December 2013

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Transcript of Mitosis

Interphase's Stages
This is when the cell is finally divided into two daughter cells. This is the end of cell division. Once mitosis and cytokinesis is completed, the cell returns back to Interphase to continue to grow once again.

Model Project BIO 202

Jovana Chavez

Cell division
Cell's Life Cycle
Early prophase
In this stage the chromosome coils and the spindle fibers are formed between the centriole pairs. Microtubules that are smaller are called astral rays. The astral rays radiate into cytoplasm.
Late prophase
In late prophase, two copies of chromosomes exist which are called chromatid. At this stage the cetomere is the point where the chromatid is connected to. Kinetochores are on protein-bound area and attach to the spindle fibers which form chromosomal microtubules.
During Metaphase the chromosomes lined up in the middle, called the metaphase plate. During this stage the spindle fibers connect to chromosomes.

This is the last stage of mitosis. It is when the chromosomes uncoil back into a chromatin. Chromatin is one of the copies of the two chromosomes that exist due to the DNA replication that happens during the S phase. When they uncoil they are forming 2 new nucleus. This stage the spindle fibers disappear.

Is a process in which a cell goes through fertilization into maturity. And split up into 2 cells.
During fertilization there is only one single cell. However there is about 75 trillion cells during maturity.

The cell life cycle is a process in which cell goes through to grow and divide.
This cycle goes through 3 stages
Interphase, Mitosis and Cytokinesis.

Mitosis's Stages
DNA replication occurs during this phase.
Reasons why cells need to divide.

They need to repair damaged tissue.
Also because when divided each new daughter cell will have a nucleus with a complete set of chromosomes
Cells will grow by being divided which will produce more cells.
And because if the cell gets too large, they won't be able to receive enough nutrients.

It is the first phase of interphase. May last up to 8 hours or more. In this phase there is cell growth and normal cell functions.
It can last up to 6 to 8 hours.
Last up to 2 to 5 hours. Protein synthesis
Cells spends most of their life cycle in this stage.
During this stage the chromatids separated. They are separated by the spindle fibers which pull them apart. When the chromatids are pulled apart they become two daughter chromosomes.
Daughter chromosomes
Metaphase plate
Spindle fibers
Centrioles in centrosome

Cleavage furrow
chromosome with two sister chromatids
Daughter Cells
This stage is when the cell grows and develops. The cell also carries out normal cell activities and it replicates all the other organelles. DNA copying, occurs during this stage.

Mitosis process can last up from 1 to 3 hours.
The process of daughter cells:
Before a cell is a daughter cell it first has to be a parent cell. A parent cell is an original cell. The daughter cell is 2 new cells that first were parents cells due to cell division.

For cell division to occur the cell first has to copy all of its own DNA. Each daughter cell is exactly the same as the parent cell. It is same due the same kind and amount of chromosomes as the parents cells.
A chromosome is a short version of DNA, it is coiled and double. The chromosome has two parts, the chromatid and the centromere. The centromere is the area in the middle that connects two identical chromatids. A long thread-like structure in a non-dividing cell is known as a chromatin.
DNA controls all the cell activities and is located in the nucleus.
DNA Helix
Daughter cells
Parent Cell
The Final Process
Late prophase
Early prophase
Steps within Interphase
Mitosis occurs in all somatic cells.
Full transcript