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Sunday 21 August 2011

Types of Cell Reproduction, Mitosis and Result from Uncontrolled Mitosis


There are 2 types of cell reproduction-mitosis and meiosis. These reproduction processes result in the creation of 2 different cell types. In mitosis, a cell that nearly exact in features to the original cell is created. By this process somatic cells or body cells are created. Meiosis is different from this in that sex cells or germ cells are produced. Certain single-celled organisms and some classes of bacteria make use of mitosis for reproduction of cells. Meiosis and mitosis differ in the same way as sexual reproduction and asexual reproduction. Not all organisms reproduce asexually. In humans and certain other organisms which sexually reproduce, meiosis takes into account the genetic contribution of the two cells combining.

Mitosis: The cell reproduction of body cells or somatic cells is termed as ‘mitosis’. In other words the process of cell division that generates new cells for growth, replacement of aged cells and repair of cells is termed as ‘mitosis’. In mitosis, a body cell will be divided into two new cells which are having identical characteristics to the original cell. There are six phases in the process of mitosis and these take place in time span of 0.5 to 1.5 hours depending on the type of tissue that is being duplicated.
Uncontrolled Mitosis: Uncontrolled mitosis otherwise known as hyperplasia occurs when body responds to stimulus or physiological change. Due to this tumors are developed or organs are enlarged. In the event of development of cancer, a person will have dysplasia that is change of cells which are immature from one form to another and this develops into cancerous cells(neoplasia).Uncontrolled mitosis relates more to the spread of the disease of cancer than being a reason for its occurrence, Due to this cancer spreads through lymph and blood.
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