When tumor cell DNA is examined from people at different stages of the same cancer type,mutations that are common to all of them

Question

Quizplus · Accepted Answer

Mutations that are common to all tumor cells from people at different stages of the same cancer type suggest that the mutation occurred early in the development of the cancer. As the cancer progresses, other mutations may accumulate, making the mutation profile more diverse between individuals.

Note: B, C, and D are incorrect because they do not provide a likely explanation for the presence of common mutations in tumor cell DNA from different individuals with the same cancer type.

When Tumor Cell DNA Is Examined from People at Different