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Gene changes within cells

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Gene changes within cells

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Gene changes within cells

Gene changes within cells

Márquez Martínez Brenda Itzel
1

repair mutation cells divide starts damaged proteins grow instructions Mutations growing cancer gene tobacco

Genes make sure that grow and make copies ( reproduce ) in an orderly and controlled way . Sometimes a change happens in the genes when a cell divides . This is a . It means that a has been damaged or lost or copied too many times .
Some mutations mean that the cell no longer understands its . It can start to grow out of control . There have to be about 6 different mutations before a normal cell turns into a cell .
Mutations in particular genes may mean that :
- a cell making too many proteins that trigger a cell to divide
- a cell stops making proteins that normally tell a cell to stop dividing
- abnormal may be produced that work differently to normal
It can take many years for a damaged cell to and and form a tumour big enough to cause symptoms or show up on a scan .
can happen by chance when a cell is dividing . They can also be caused by the processes of life inside the cell , or by things coming from outside the body , such as the chemicals in smoke . And some people can inherit faults in particular genes that make them more likely to develop a cancer .
Some genes get every day and cells are very good at repairing them . But over time , the damage may build up . And once cells start too fast , they are more likely to pick up further mutations and less likely to be able to the damaged genes .