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SlideshowReport

An endoscopic view of the colon of someone who carries the normal alleles for the APC gene

Description
(a) An endoscopic view of the colon of someone who carries the normal alleles for the APC gene. The small number of polyps on the wall are a precursor to colon cancer. (b) Polyps in the colon of someone who carries a mutant APC allele. Hundreds of polyps are present. If a cell in one of these polyps acquires enough mutations, it will transform into a cancer cell, forming colon cancer.
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