Its more complicated: Currently,more than 1% of all human genes are implicated via mutation in cancer.Many people think that the risk of Ca is always passed on through families as a single "cancer gene".However,like other complex diseases, changes in many genes that each play a role in the development of cancer are much more likely to be the cause of familial cancer than a change in a single gene.So,see a geneticist
Answered 10/19/2014
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