Cancer 2

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of the chromosomes-hereditary regions where the DNA molecule may break or its portions may be rearranged into new combinations. Actually most of the times, the nucleus and the DNA are constantly exposed to substances that may alter the genes. But these alterations are almost always prepared by intricate mechanism with the function of preventing havoc in the cell. But if these changes persist in a given cell, that altered gene will breed true. Such damage to the chromosome may remove the oncogene from the influence of the genetic control mechanisms that normally govern its actions or an inactive oncogene may remove next to another gene that has an activating affect. This way the DNA in the cell is changed to activate the oncogenes. Instead of sending out the signals for normal growth and development, oncogenes carry instructions that cause cells to grow and divide more rapidly than normal cells - Researchers have found that when the cell membranes of two normal cells touch each ...

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