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Cancer has a strong genetic component, as familial DNA mutations can be passed on from generation to generation. However, genes and their expression are also greatly influenced by the environment. For example, smoking can lead to an increased incidence of lung cancer while prolonged exposure to ultraviolet radiation can result in skin cancer.

Effect of the Environment on Cancer. Karp, Gerald. "Cancer." Cell and Molecular Biology: Concepts and Experiments Eighth Edition Binder Ready Version. Published in the United States: John Wiley, 2015. Pg 631. Print.

Based on the data represented in the figure, the environment shows the strongest influence on which type of cancer in these groups?


Breast cancer.


Colon cancer.


Stomach cancer.

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