Explain the link between cancer and mitosis. Describe how the chances of cancer developing in the human body may be increased.
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e most dangerous aspects of cancer, as it can be very difficult to find these secondary tumours and remove them.
Changes in genes are called mutation and any factor that brings about one is called a mutagen. An agent that causes cancer is called a carcinogen. Most mutated cells either destroyed by the bodies immune system or die with no ill effect on the body.
Some of the factors that increase mutation rates, and therefore the likelihood of cancer, include chemicals, viruses, and ionising radiation. Cancers have also been known to have hereditary links.
Ionising radiation includes X-rays, gammer rays and particles from the decay of radioactive material. They cause the formation of damaging ions inside cells that can break DNA strands. With the depletion of the ozone layer, increasing amounts of ultra- violet light, which can damage genes, are getti
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